# Feedlot Health Management: Arrival Protocols and Disease Surveillance ## Key Takeaways - Arrival risk stratification is critical, integrating factors like weight, transport distance (associated with BRD morbidity, mortality, and ADG), source type (direct ranch purchase is lower risk than auction market), and commingling history, which can alter performance and necessitate health programs designed for the highest-risk animal. - Bovine Respiratory Disease (BRD) accounts for approximately 75% of total feedlot morbidity during the receiving period, a sustained window of vulnerability due to physiological stress from weaning, transport, and commingling, leading to profound shifts in the nasopharyngeal microbiota. - Metaphylactic antimicrobial administration is a population-level intervention justified by predicted BRD risk (e.g., light weight, long transport, auction origin) to reduce negative health and performance effects, rather than routine use. - Disease surveillance aims for early detection of rising morbidity before mortality increases, utilizing cohort-level data stratified by arrival date, source, and processing group, with core metrics including daily pull rate, cumulative morbidity, and mortality, against established action thresholds. - Arrival processing sequence should include rest periods for long-distance transports, followed by individual identification, clinical inspection, vaccination (e.g., respiratory viral vaccines), parasite control, metaphylaxis if indicated, growth implant, and surgical procedures, with meticulous record-keeping for each intervention. - Diagnostic confirmation for morbidity exceeding thresholds involves submitting deep nasopharyngeal swabs for bacterial culture and PCR, acute/convalescent serum for viral exposure, and lung tissue for histopathology and culture, with adherence to WOAH and USDA APHIS reporting requirements for reportable pathogens. --- This article addresses the health management of beef cattle from arrival at a feedlot through the feeding period, with emphasis on arrival risk assessment, processing protocols, and surveillance systems for morbidity and mortality. It is written for practicing veterinarians who design, implement, or audit feedlot health programs and who require a decision framework grounded in the current literature on bovine respiratory disease (BRD) epidemiology and receiving-period management. The clinical questions this reference answers are practical ones. How should arrival risk be stratified when cattle come from multiple sources? What processing decisions are supported by evidence, and which remain matters of professional judgment? How can morbidity data be collected and interpreted so that intervention thresholds are meaningful instead of arbitrary? The article excludes individual treatment protocols and focuses instead on population-level health management. ## At a Glance | Parameter | Decision Point | Source or Rationale | |---|---|---| | Arrival risk classification | Weight, distance traveled, source type, commingling history | [Metaphylactic antimicrobial therapy review](https://pubmed.ncbi.nlm.nih.gov/20619185/) | | BRD morbidity share | Approximately 75% of total feedlot morbidity | [Best management practices for newly weaned calves](https://pubmed.ncbi.nlm.nih.gov/28727007/) | | Transport distance effect | Distance associated with BRD morbidity, mortality, ADG, and carcass weight | [Distance traveled and feedlot outcomes study](https://pubmed.ncbi.nlm.nih.gov/22247119/) | | Source risk hierarchy | Direct ranch purchase lower risk than auction market purchase | [Best management practices for newly weaned calves](https://pubmed.ncbi.nlm.nih.gov/28727007/) | | Commingling effect | Ranch calves commingled with market calves show altered performance | [Commingling and weaning protocol study](https://pubmed.ncbi.nlm.nih.gov/18567723/) | | Nasopharyngeal microbiota | Profound community shifts from weaning to day 40 after arrival | [Nasopharyngeal microbiota evolution study](https://pubmed.ncbi.nlm.nih.gov/27066712/) | | Metaphylaxis indication | Mass medication justified by predicted BRD risk, not routine use | [Metaphylactic antimicrobial therapy review](https://pubmed.ncbi.nlm.nih.gov/20619185/) | | Surveillance goal | Detect rising morbidity before mortality increases | [USDA APHIS animal health information](https://www.aphis.usda.gov/livestock-poultry-disease) | ## The Biology of Arrival Stress and Disease Susceptibility The receiving period is the highest-risk window in the feedlot production cycle. Calves leaving their origin ranch enter a sequence of stressors that includes weaning, transport, commingling with unfamiliar animals, novel feed and water, and handling. Each of these events contributes to a physiological state that favors respiratory pathogen proliferation and clinical disease expression. The nasopharyngeal microbiota undergoes a profound evolution during this period. In a longitudinal study of Angus-cross steers, the bacterial community in the deep nasal passages changed substantially from weaning to arrival and again from arrival to day 40, with 92 operational taxonomic units shifting in abundance over time. The genus *Mycoplasma* accounted for 53% of the total bacterial population. The authors proposed that an evolving bacterial community may be less capable of resisting colonization by pathogenic bacteria, which would explain the heightened susceptibility observed in the weeks immediately following arrival. This instability is not a transient event but a process that extends well into the feeding period. The practical implication is that the receiving period is not a single risk event but a sustained window of vulnerability. Surveillance programs must therefore remain active beyond the first days on feed, and processing decisions made at arrival should anticipate disease pressure that may peak days or weeks later. ## Risk Stratification at Arrival Arrival risk assessment integrates animal-level and cohort-level factors. The weight and age of the cattle, distance traveled, environmental conditions, previous health history, and visual inspection at arrival all influence the decision to implement metaphylactic antimicrobial protocols. Lighter calves with extended transport distances and unknown health histories represent the highest-risk category, while heavier, preconditioned calves from a single source present lower risk. Transport distance has been quantified as an independent risk factor. In a retrospective study of 14,601 cattle cohorts arriving at 21 US commercial feedlots between 1997 and 2009, distance traveled was significantly associated with BRD morbidity, all-cause mortality, average daily gain, and hot carcass weight. The median transport distance was 552 km. The effect of distance was modified by other cohort-level demographic variables, meaning that distance alone does not determine outcome but interacts with factors such as season and source. Source type is a second major risk axis. Calves purchased directly from a ranch have fewer health problems than calves purchased through auction markets, and the longer a calf remains in the marketing chain, the more likely health problems become. Calves that have spent several days in the marketing chain may develop clinical BRD before or very soon after arrival, whereas cattle with less time in the chain may become ill later. This temporal difference matters for surveillance design because the expected onset of disease shifts with marketing history. ## Commingling and Its Consequences Commingling cattle from different sources is standard practice in commercial feedlots, but it carries measurable health and performance costs. In a controlled receiving-period study, ranch-origin steer calves from different weaning and vaccination protocols were commingled with auction-market steers of unknown health history. Ranch-origin calves tended to have greater average daily gain than commingled or market calves, although weaning management within the ranch groups did not significantly affect gain. The commingling effect on performance was independent of the preconditioning strategy used on the ranch. This finding supports a practical rule. When cattle of different risk profiles must be housed together, the health program should be designed for the highest-risk animal in the pen, not the average. Processing decisions, pen stocking density, and surveillance frequency should reflect the risk level of the most susceptible cohort member. ## Metaphylaxis as a Population-Level Intervention Metaphylactic antimicrobial administration on arrival is a management decision, not a treatment decision. The goal is to reduce the negative health and performance effects of BRD in cattle that are predicted to be at elevated risk. Current data indicate that metaphylactic programs significantly reduce negative health effects and improve feed performance in cattle that would otherwise develop BRD. The decision framework for metaphylaxis weighs the cost of mass medication against the expected cost of disease. Factors favoring metaphylaxis include light weight, long transport distance, auction market origin, commingling, adverse weather, and visible signs of disease or dehydration at arrival. Factors against include high purchase weight, single-source origin, preconditioning history, and low predicted disease pressure. The decision is inherently probabilistic and should be revisited as new cohorts arrive and as regional disease patterns shift. ## Surveillance Objectives and Design Disease surveillance in the feedlot serves two distinct purposes. The first is early detection of rising morbidity so that intervention can occur before mortality increases. The second is evaluation of the arrival protocol itself, allowing the veterinarian to determine whether metaphylaxis decisions, vaccination timing, and pen management are achieving their intended outcomes. Surveillance data should be collected at the cohort level and stratified by arrival date, source, weight class, and processing group. Cumulative BRD morbidity and all-cause mortality are the standard outcome measures, and they should be tracked against expected baselines for the region and season. The [USDA APHIS animal health information](https://www.aphis.usda.gov/livestock-poultry-disease) portal provides national context for disease occurrence, while [WOAH terrestrial animal health standards](https://www.woah.org/en/what-we-do/standards/codes-and-manuals/terrestrial-code-online-access/) frame surveillance obligations in an international context. Neither source replaces local data, but both help the practitioner calibrate expectations. A surveillance system is only as good as its case definition. Feedlot personnel must apply a consistent clinical scoring system for BRD, and the veterinarian must audit the scoring periodically to prevent diagnostic drift. The relationship between treatment rates and true disease prevalence is never exact, but consistency in case definition makes the data interpretable over time. ## Arrival Processing Sequence The arrival protocol begins before cattle enter the chute. Confirm the load against the order buyer's manifest, noting source, number of head, estimated weights, and any health history provided. Assign a unique lot identification that will follow the cohort through harvest. This lot identifier becomes the primary key for all subsequent health and performance records. Processing order matters. Cattle should be allowed to rest in a receiving pen with access to water for several hours before processing if they have traveled more than approximately 8 hours. [Research on transport distance and feedlot outcomes](https://pubmed.ncbi.nlm.nih.gov/22247119/) demonstrates that distance traveled is significantly associated with bovine respiratory disease morbidity, mortality, average daily gain, and hot carcass weight, with effects modified by other cohort-level factors. Longer hauls warrant longer rest periods before chute work. The standard processing sequence is: 1. **Individual identification and lot assignment.** Apply ear tag, record breed, sex, and estimated weight. Electronic identification tags expedite later data capture. 2. **Clinical inspection.** Observe each animal for depression, nasal or ocular discharge, cough, and gait abnormalities. Pull suspect animals into a hospital pen for individual examination and treatment decisions. 3. **Vaccination.** Administer respiratory viral vaccines according to the herd health plan. Modified-live products require careful handling, including protection from heat and sunlight and use within the manufacturer's specified time after reconstitution. 4. **Parasite control.** Administer an appropriate anthelmintic. [Data on Cooperia punctata in feedlot calves](https://pubmed.ncbi.nlm.nih.gov/21821358/) indicate that Cooperia species have become the most prevalent parasites in United States cow/calf operations, partly due to reduced activity of macrocyclic lactones against these parasites. Product selection should account for local parasite spectra and resistance patterns. 5. **Metaphylaxis.** Administer a metaphylactic antimicrobial when the lot-level risk assessment indicates elevated probability of bovine respiratory disease. [Reviews of metaphylactic antimicrobial use in stocker and feedlot cattle](https://pubmed.ncbi.nlm.nih.gov/20619185/) emphasize that the decision depends on weight, distance traveled, environmental conditions, previous health history, visual inspection at arrival, and predicted disease risk. 6. **Growth implant.** Apply according to the operation's performance program and the target endpoint. 7. **Castration and dehorning.** Perform surgical procedures at arrival when indicated, using appropriate analgesia and anesthesia. Calves that arrive intact should be castrated early in the feeding period to reduce subsequent morbidity and aggressive behavior. The processing crew should work in a defined sequence with one person recording each intervention. A second person should verify that each animal receives the correct products, particularly when multiple loads from different sources are processed in a single day. ## The Receiving Period The first 14 to 21 days after arrival constitute the receiving period. During this window, bovine respiratory disease accounts for approximately 75% of total feedlot morbidity. [Best management practices for newly weaned calves](https://pubmed.ncbi.nlm.nih.gov/28727007/) document that direct costs of bovine respiratory disease include death loss, treatment and labor, and prevention, while indirect costs include decreased growth performance, reduced feed efficiency, increased days on feed, and lower carcass merit. Calves purchased directly from a ranch generally have fewer health problems than calves purchased through auction markets. The longer a calf remains in the marketing chain, the more likely health problems become. Calves that have spent several days in the marketing chain may develop clinical disease before or very soon after arrival, whereas cattle with less marketing chain exposure may become ill later in the receiving period. ### Feeding During Receiving Start cattle on a high-forage receiving ration. Offer long-stem hay in the bunk for the first 24 to 48 hours, then transition to a receiving diet containing 60% to 75% roughage on a dry matter basis. Bunk management during receiving differs from the growing and finishing phases. The objective is to stimulate intake without causing digestive upset, not to maximize gain. Provide 1 to 2 feet of bunk space per head and 1 to 2 square feet of water tank perimeter per head during the receiving period. Overcrowding at the bunk disproportionately affects smaller or more timid calves, which may eat less and become more susceptible to disease. ### Pen-Level Monitoring Daily observation of each pen is the foundation of early disease detection. The person responsible for health checks should walk the pens in the same order each morning, before feeding, when cattle are standing and active. Observations should include: - **Bunk reading.** Assess the amount of feed remaining from the previous delivery. A clean bunk with cattle waiting indicates adequate intake. Feed remaining several hours after delivery suggests reduced intake by some or all of the pen. - **Behavioral assessment.** Identify cattle that are isolated from the group, slow to rise, or reluctant to move. Depression is often the earliest visible sign of bovine respiratory disease. - **Respiratory signs.** Note cough, nasal discharge, ocular discharge, and increased respiratory effort. A calf that coughs repeatedly when forced to move warrants closer examination. - **Gait and posture.** Observe for lameness, abdominal distension, and signs of bloat or acidosis. Cattle identified during pen checks should be moved quietly to the hospital facility for individual examination. The examination should include rectal temperature, respiratory rate and effort, auscultation of the lungs, and assessment of hydration status. The California Calf Health Scoring Chart provides a structured framework for scoring nasal discharge, ocular discharge, cough, and rectal temperature, which can be adapted for feedlot receiving cattle. ## Surveillance Data Systems Effective surveillance requires more than daily observation. The feedlot should maintain a computerized record system that captures individual treatments, pen-level morbidity and mortality, and performance data. The system should generate daily and cumulative reports that allow the veterinarian to detect emerging problems before they become epidemics. ### Core Surveillance Metrics | Metric | Definition | Action Threshold | What It Detects | |--------|-----------|-----------------|-----------------| | Daily pull rate | Number of cattle pulled for examination per 100 head at risk per day | Greater than 2% for two consecutive days | Rising disease incidence, often respiratory disease or digestive upset | | Cumulative morbidity | Total cattle treated per 100 head placed | Greater than 15% by day 28 | Overall disease pressure in the cohort | | Cumulative mortality | Total deaths per 100 head placed | Greater than 1% by day 28 | Severe disease, management failure, or toxic event | | Chronic rate | Cattle pulled more than twice or pulled after day 21 per 100 head placed | Greater than 3% | Treatment failure, inappropriate metaphylaxis selection, or chronic disease | | Retreatment rate | Cattle treated more than once per 100 cattle treated | Greater than 15% | Antimicrobial failure, incorrect diagnosis, or advanced disease at first pull | These thresholds are operational guidelines, not fixed rules. A high-risk cohort of lightweight auction-market calves may legitimately exceed the daily pull threshold in the first week, while a low-risk group of preconditioned ranch calves should remain well below it. The veterinarian should establish cohort-specific expected ranges based on risk stratification at arrival. ### Data Interpretation Trend analysis is more informative than single-day values. Plot daily pull rates against days on feed for each lot. The typical bovine respiratory disease curve peaks between days 3 and 10 after arrival, then declines. A second peak after day 14 suggests either commingling of a new source into the pen, failure of the initial metaphylactic program, or a different disease process such as histophilosis or mycoplasma pneumonia. Compare current lot performance against historical data from similar cohorts. [The nasopharyngeal microbiota of beef cattle undergoes profound changes from weaning to arrival and from arrival to day 40](https://pubmed.ncbi.nlm.nih.gov/27066712/), with the abundance of many bacterial taxa shifting significantly over time. An unstable bacterial community may be less capable of resisting colonization by pathogenic bacteria, which may explain the timing of disease peaks in the receiving period. ### Diagnostic Confirmation When morbidity exceeds expected thresholds, collect diagnostic samples from acutely affected, untreated cattle. Deep nasopharyngeal swabs submitted for bacterial culture and polymerase chain reaction can identify the pathogens involved. Acute and convalescent serum samples can document viral exposure. Lung tissue from fatal cases should be submitted for histopathology and culture. The [WOAH terrestrial animal health code](https://www.woah.org/en/what-we-do/standards/codes-and-manuals/terrestrial-code-online-access/) provides international standards for disease surveillance and reporting that may apply when unusual or reportable pathogens are suspected. The [USDA APHIS animal health information](https://www.aphis.usda.gov/livestock-poultry-disease) portal provides national program information for disease control and reporting in the United States. Veterinarians should be familiar with the reporting requirements in their jurisdiction. ## Documentation and Communication Every treatment, death, and necropsy finding must be recorded with the date, animal identification, lot number, clinical findings, and interventions applied. This record serves three purposes: it supports individual animal care, it feeds the surveillance system, and it provides the data needed to evaluate the effectiveness of arrival protocols. Schedule a formal health review with the feedlot manager at defined intervals, typically every 7 to 14 days during the receiving period and monthly thereafter. The review should examine: - Morbidity and mortality curves for each active lot - Treatment response rates by antimicrobial class - Necropsy findings - Bunk management and ration changes - Processing records for errors or omissions The review should produce written recommendations that are filed with the lot records. Changes to the arrival protocol should be made deliberately, one variable at a time, so that their effects can be assessed. [Commingling studies in receiving cattle](https://pubmed.ncbi.nlm.nih.gov/18567723/) show that ranch-origin calves tend to have greater average daily gain than commingled or auction-market calves, although weaning management within ranch-origin groups may not affect gain. These source effects should be accounted for when interpreting lot performance. ## Equipment and Facility Considerations The processing facility should include a working chute with head restraint, a palpation cage or table for examination, and adequate lighting. Hospital pens should be located near the processing area, with access to water and shade. Chronic and acutely ill cattle should be separated so that aggressive treatment of acute cases is not delayed by the presence of chronically affected animals. Electronic identification readers, scale interfaces, and handheld data recorders reduce transcription errors and speed processing. The data system should be backed up daily and should be accessible to the attending veterinarian for remote review when needed. Facility design should allow cattle to be moved quietly with minimal stress. Sharp corners, slippery floors, and excessive noise increase handling stress and may worsen disease outcomes. The [AVMA practice resources](https://www.avma.org/resources-tools) and the [MSD Veterinary Manual](https://www.msdvetmanual.com/) provide additional guidance on facility design and handling practices for beef cattle. ## Recognized Complications and Early Detection The most consequential failure in feedlot surveillance is delayed recognition of a disease event that has already crossed an intervention threshold. Pen riders and processing crews detect most morbidity, but their accuracy depends on clear case definitions and regular calibration against diagnostic findings. A common failure mode is the gradual drift in what constitutes a "sick pull," where one pen rider treats earlier and another later, producing artefactual variation in morbidity rates that obscures true disease trends. Early detection of a developing BRD outbreak relies on comparing observed morbidity against the expected baseline for the cohort's risk profile. A cohort of high-risk auction-market calves with a 15% expected morbidity that reaches 10% by day 7 is not a problem, but the same cohort reaching 10% by day 3 signals that the arrival protocol underestimated risk. The discriminating check is the temporal distribution of cases, not the cumulative count alone. Clustering of cases within the first 5 days after arrival points to infection pressure established before arrival, whereas a second peak at days 14 to 21 suggests commingling-related transmission or failure of the initial metaphylactic program. Digestive disturbances, particularly ruminal acidosis and bloat, present a second recognized complication. These are detected through daily pen inspection for off-feed behavior, depressed animals, and abdominal distension, with confirmation at the treatment chute by rumen auscultation and fecal consistency. The failure mode is attributing all morbidity to BRD, which leads to inappropriate antimicrobial use and missed dietary corrections. Lameness and injury constitute a third category. Footrot, interdigital phlegmon, and joint infections produce characteriztic gait abnormalities that experienced pen riders recognize readily. The complication arises when lameness is recorded as a generic morbidity event without anatomical localization, preventing the identification of facility-related causes such as damaged flooring, improper gate alignment, or overstocked hospital pens. ## Common Errors and Corrective Actions Less experienced clinicians frequently over-rely on a single diagnostic modality. Rectal temperature is useful but imperfect, as febrile responses vary with circadian rhythm, environmental temperature, and the stage of disease. The corrective action is to combine temperature with a standardized clinical illness score that incorporates depression, appetite, and respiratory effort, and to calibrate that score against necropsy findings and laboratory results. A second error is treating surveillance data as a record-keeping exercise instead of a decision tool. Morbidity rates that are calculated but not reviewed against action thresholds provide no clinical value. The corrective action is to establish explicit trigger points before the feeding period begins, such as a doubling of the 7-day rolling morbidity rate or a mortality rate exceeding 1% in a single week, and to schedule formal data reviews at fixed intervals. A third error involves misinterpretation of metaphylaxis failure. When morbidity remains high despite mass medication, the inexperienced clinician may conclude the antimicrobial was ineffective. The more likely explanations are incorrect risk classification at arrival, inadequate dose or route of administration, or disease caused by pathogens outside the antimicrobial's spectrum. The corrective action is to obtain deep nasopharyngeal or lung samples from acute cases for culture and susceptibility testing before changing protocols. ## Troubleshooting Table | Observation | Likely Cause | Discriminating Check | |---|---|---| | Morbidity spike at days 2 to 4 | Infection established before arrival | Review marketing channel history, transport distance | | Morbidity spike at days 14 to 21 | Commingling-related transmission | Compare morbidity in commingled vs single-source pens | | Poor response to metaphylaxis | Incorrect risk classification or pathogen resistance | Culture and susceptibility from acute cases | | Elevated mortality without elevated morbidity | Deaths occurring before detection | Audit pen-check frequency and timing | | Recurrent lameness in specific pens | Facility-related injury | Inspect flooring, gates, and hospital pen surfaces | | High pull rates with low treatment response | Case definition drift among pen riders | Recalibrate clinical scoring against necropsy findings | ## Evidence Limitations and Divergent Expert Opinion The evidence base for feedlot health management contains genuine gaps. The relationship between nasopharyngeal microbiota composition and disease susceptibility is established in broad terms, but the practical application of microbiome data to individual cohort management remains experimental. Similarly, the productivity impact of subclinical parasitism is documented for Cooperia punctata under controlled feedlot conditions, yet the translation of these findings to field settings with mixed parasite burdens and variable management is uncertain. Expert opinion diverges on several practical questions. The optimal duration of the receiving period before transitioning to final rations varies by region and calf class, with no controlled trials establishing a universal standard. The role of viral vaccination at arrival for high-risk calves remains contested, with some authorities advocating immediate modified-live vaccination and others recommending a delay until respiratory disease risk has subsided. The threshold for metaphylaxis use in medium-risk calves is similarly debated, with economic considerations weighing heavily in the decision. ## Referral, Consultation, and Regulatory Reporting Most feedlot health problems are managed on-site, but specific circumstances warrant escalation. A mortality rate exceeding 2% in a single cohort, or a morbidity pattern that does not respond to two successive treatment adjustments, justifies laboratory involvement. Necropsy of representative cases, with histopathology and bacterial culture from lung, liver, and gastrointestinal tract, provides the diagnostic clarity needed to revise protocols. Specialist consultation with a veterinary nutritionist is indicated when digestive disturbances coincide with ration changes or when feed analysis reveals unexpected variation in nutrient content. A veterinary epidemiologist may be valuable when surveillance data show unexplained temporal or spatial clustering that suggests an infectious disease beyond BRD. Regulatory reporting obligations vary by jurisdiction. Diseases with national control programs, unusual mortality events, and suspected foreign animal diseases require notification to the appropriate animal health authority. The [USDA APHIS animal health information](https://www.aphis.usda.gov/livestock-poultry-disease) portal provides current guidance on reportable conditions in the United States, while the [WOAH terrestrial animal health standards](https://www.woah.org/en/what-we-do/standards/codes-and-manuals/terrestrial-code-online-access/) define international notification requirements. Veterinarians should confirm the specific reporting list for their region before the feeding season begins, as requirements change with disease eradication progress and emerging threats. ## Frequently Asked Questions ### How Should I Prioritize Health Management Investments When Operating Budgets Are Limited? Prioritize interventions by expected impact on arrival risk. Metaphylaxis for high-risk calves consistently reduces bovine respiratory disease morbidity and improves feed performance, making it a primary investment target. [Metaphylactic antimicrobial protocols for stocker and feedlot cattle](https://pubmed.ncbi.nlm.nih.gov/20619185/) should be funded before optional enhancements such as advanced diagnostic platforms. Direct-sourced, preconditioned calves carry lower health risk than auction-market calves, so purchasing strategies may reduce downstream costs more effectively than additional arrival interventions. [Best management practices for newly weaned calves](https://pubmed.ncbi.nlm.nih.gov/28727007/) emphasize that reducing time in the marketing chain lowers morbidity. Allocate remaining funds to accurate individual identification, treatment records, and trained pen riders, as surveillance quality determines whether other investments yield measurable returns. ### What Is the Minimum Viable Surveillance System When Electronic Data Capture Is Unavailable? A paper-based system functions adequately if it captures daily pen morbidity, mortality, treatment dates, and product identification. Use a standardized clinical case definition for bovine respiratory disease so different observers record comparable data. Maintain a dedicated logbook per pen with columns for date, ear tag, clinical signs, rectal temperature, and treatment. Transfer these records to a spreadsheet weekly to calculate cumulative morbidity and mortality. [USDA APHIS animal health information](https://www.aphis.usda.gov/livestock-poultry-disease) provides guidance on disease recording that supports national surveillance objectives. The critical failure mode is inconsistent case definitions, not the recording medium. Train all personnel on the same scoring system and audit records monthly for completeness. ### How Does Feedlot Surveillance Differ for Dairy Beef or Holstein Steers? Holstein steers present distinct surveillance challenges because their behavioral and clinical presentation of respiratory disease differs from beef breeds. They tend to show depression and reduced feed intake earlier than classic cough and nasal discharge, so pen riders must be trained to recognize subtler signs. The nasopharyngeal microbiota of cattle undergoes profound changes from weaning through arrival, and this instability may influence disease susceptibility across production types. [Evolution of the nasopharyngeal microbiota in beef cattle](https://pubmed.ncbi.nlm.nih.gov/27066712/) documents this transition in beef calves, but dairy-origin cattle likely experience similar disruption. Monitor Holstein pens more frequently during the first 21 days, use feed bunk attendance as a primary screening indicator, and expect higher chronic morbidity rates that require separate tracking from acute bovine respiratory disease cases. ### What Records Should Be Kept to Support Both Clinical Decisions and Regulatory Requirements? Maintain three record streams: individual animal treatment records, pen-level morbidity and mortality summaries, and arrival processing logs. Individual records require ear tag, date, clinical signs, product, dose, route, and withdrawal date. Pen summaries should include cumulative morbidity, mortality, and retreatment rates calculated weekly. Arrival logs document source, transport distance, vaccination history, and metaphylaxis decisions. [WOAH terrestrial animal health standards](https://www.woah.org/en/what-we-do/standards/codes-and-manuals/terrestrial-code-online-access/) address surveillance and reporting obligations that may apply depending on jurisdiction and disease status. Store records for at least the full feeding period plus any period required by local regulation. Ensure records distinguish metaphylaxis from therapeutic treatment, as this distinction matters for antimicrobial stewardship reviews and residue avoidance. ### How Do I Explain Surveillance Findings to a Producer Who Wants to Reduce Treatment Costs? Frame surveillance data as a cost allocation tool instead of a treatment justification system. Show the producer that bovine respiratory disease accounts for approximately 75% of total feedlot morbidity and that treated cattle return substantially less at harvest than untreated cattle. [Best management practices for newly weaned calves](https://pubmed.ncbi.nlm.nih.gov/28727007/) document these economic impacts directly. Present cumulative morbidity trends by source and arrival date so the producer sees which purchasing decisions drive treatment costs. Explain that metaphylaxis reduces negative health effects and improves feed performance, making it a cost-saving intervention despite its upfront expense. [Metaphylactic antimicrobial therapy for bovine respiratory disease](https://pubmed.ncbi.nlm.nih.gov/20619185/) provides the evidence base for this discussion. Avoid framing surveillance as monitoring treatment expenses alone, emphasize its role in identifying preventable risk factors. ### When Should I Suspect That Morbidity Patterns Reflect Something Other Than Bovine Respiratory Disease? Investigate when morbidity exceeds expected levels for the risk class, when clinical signs are atypical, when retreatment rates climb above 15%, or when mortality occurs without prior treatment. Consider digestive disorders, particularly ruminal acidosis and bloat, which present with depression and inappetence that pen riders may misattribute to respiratory disease. Evaluate water system function, bunk management, and ration consistency before expanding diagnostic testing. If clinical signs include neurologic deficits, mucosal lesions, or unusual age distribution, pursue laboratory confirmation. [MSD Veterinary Manual professional reference](https://www.msdvetmanual.com/) provides differential guidance for common feedlot conditions. Distance traveled modifies bovine respiratory disease risk, so a morbidity spike in short-haul, low-risk cattle warrants closer scrutiny than the same rate in high-risk, long-haul cohorts. [Associations between transport distance and feedlot health outcomes](https://pubmed.ncbi.nlm.nih.gov/22247119/) can help calibrate expected baselines. ## Related Clinical & Scientific Guides * [Rumen Health Assessment in Dairy Cows: Clinical and Subclinical Indicators](/knowledge/veterinary-medicine/food-animal-medicine/rumen-health-assessment-dairy-cows-clinical-subclinical-indicators) * [Mastitis Control Programs in Dairy Herds: Monitoring and Prevention](/knowledge/veterinary-medicine/food-animal-medicine/mastitis-control-programs-dairy-herds-monitoring-prevention) * [Swine Nutrition and Health: Feed-Related Disease Diagnosis](/knowledge/veterinary-medicine/food-animal-medicine/swine-nutrition-health-feed-related-disease-diagnosis) ## References and Further Reading - [Cooperia punctata: effect on cattle productivity?](https://pubmed.ncbi.nlm.nih.gov/21821358/). 2012. - [Metaphylactic antimicrobial therapy for bovine respiratory disease in stocker and feedlot cattle.](https://pubmed.ncbi.nlm.nih.gov/20619185/). 2010. - [Best management practices for newly weaned calves for improved health and well-being.](https://pubmed.ncbi.nlm.nih.gov/28727007/). 2017. - [Effects of commingling beef calves from different sources and weaning protocols during a forty-two-day receiving period on performance and bovine respiratory disease.](https://pubmed.ncbi.nlm.nih.gov/18567723/). 2008. - [Evolution of the nasopharyngeal microbiota of beef cattle from weaning to 40 days after arrival at a feedlot.](https://pubmed.ncbi.nlm.nih.gov/27066712/). 2016. - [Associations between the distance traveled from sale barns to commercial feedlots in the United States and overall performance, risk of respiratory disease, and cumulative mortality in feeder cattle during 1997 to 2009.](https://pubmed.ncbi.nlm.nih.gov/22247119/). 2012. - [USDA APHIS Animal Health Information](https://www.aphis.usda.gov/livestock-poultry-disease). USDA APHIS. - [FAO Animal Production and Health](https://www.fao.org/animal-production/en/). FAO. - [MSD Veterinary Manual, Professional Edition](https://www.msdvetmanual.com/). MSD Veterinary Manual. ## Related Articles - [Dairy Herd Data Management: Using Records for Health Decisions](/knowledge/veterinary-medicine/food-animal-medicine/dairy-herd-data-management-using-records-health-decisions) - [Bovine Respiratory Disease Prevention: Vaccination and Management Strategies](/knowledge/veterinary-medicine/food-animal-medicine/bovine-respiratory-disease-prevention-vaccination-management-strategies) - [Calf Health Scoring Chart: Application for Respiratory Disease Detection](/knowledge/veterinary-medicine/food-animal-medicine/calf-health-scoring-chart-application) - [Swine Nutrition and Health: Feed-Related Disease Diagnosis](/knowledge/veterinary-medicine/food-animal-medicine/swine-nutrition-health-feed-related-disease-diagnosis) - [Differential Diagnosis of Acute Bovine Respiratory Disease in Feedlot Cattle](/knowledge/veterinary-medicine/food-animal-medicine/differential-diagnosis-acute-bovine-respiratory-disease-feedlot) > This article is educational professional reference material for veterinary audiences. It is not a substitute for veterinary diagnosis, individual clinical judgment, current product labeling, or applicable regulatory requirements.