Diagnostic Approach to Lameness in Dairy Cattle: Lesion Localization

By Dr. Zubair Khalid, DVM, MS, PhD · 2026-08-11

Key Takeaways

• Lameness in dairy cattle is predominantly a hindlimb issue (92%), with a strong predilection for the lateral claw (65% of hindlimb lesions), necessitating a systematic examination prioritizing these areas.
• A structured diagnostic approach involves standardized locomotion scoring (score ≥3 indicates significant lameness), standing and weight-bearing assessment (observing limb posture and digital pulse), and regional palpation/manipulation before lifting the foot.
• Definitive lesion identification after lifting the foot requires meticulous inspection of the coronary band, interdigital space, and sole, followed by targeted hoof tester application and potentially minimal sole trimming to avoid iatrogenic pain.
• Perineural anesthesia, specifically plantar nerve blocks in the hindlimb and palmar nerve blocks in the forelimb, is crucial for localizing pain to the foot when physical examination is inconclusive, guiding further investigation or treatment.
• Radiography is indicated for suspected fractures, septic arthritis, osteomyelitis, or deep foreign bodies, while ultrasonography is useful for soft tissue evaluation; advanced imaging (CT/MRI) is reserved for complex, non-responsive cases.
• Accurate documentation using standardized nomenclature for locomotion scores and lesion types (e.g., sole ulcer, white line disease, digital dermatitis) is essential for herd-level monitoring, treatment evaluation, and informed prevention strategies.

Lameness remains one of the most economically significant and welfare-compromising conditions affecting dairy cattle worldwide. This article provides a systematic framework for localizing the source of lameness in dairy cows, with emphasis on distinguishing claw horn lesions from upper limb conditions. It is written for practicing veterinarians who require a structured diagnostic approach that integrates gait assessment, regional examination, and lesion classification. The clinical question addressed is straightforward: when a cow is lame, where exactly is the problem, and how does the examiner reach that conclusion with confidence?

The diagnostic challenge in dairy lameness is compounded by the anatomical distribution of lesions. In a large survey of 37 dairy farms across England and Wales, lesions in the hindlimbs accounted for 92 percent of all lameness episodes, with 65 percent located in the outer claw, 20 percent in the skin, and 14 percent in the inner claw. Sole ulcers and white line lesions were the predominant diseases of horn, while digital dermatitis was the most common skin disease. These figures establish the prior probability that guides the examination: hind feet, and specifically the lateral claw of the hind foot, deserve the most rigorous scrutiny.

The approach presented here proceeds through four stages: standardized locomotion scoring, standing and weight-bearing assessment, regional palpation and manipulation, and definitive lesion identification after lifting the foot. Each stage narrows the differential diagnosis and informs the decision of whether to pursue claw horn examination or investigate the upper limb. The emphasis throughout is on reproducible examination technique and explicit decision criteria.

At a Glance

Locomotion Scoring as the Entry Point

Locomotion scoring provides the standardized, repeatable assessment that identifies lame cows and quantifies lameness severity. The most widely used systems assign scores from 1 to 5, where a score of 3 or higher indicates clinically significant lameness. The prevalence of lameness measured by such scoring varies widely between farms, with a mean annual prevalence of 20.6 percent reported across 37 farms, ranging from 2.0 to 53.9 percent. This variability underscores the importance of herd-level locomotion scoring programs instead of reliance on individual cow observation alone.

The scoring system serves two distinct purposes. At the individual level, it triggers the diagnostic workup described in this article. At the herd level, repeated scoring provides a monitoring parameter for lameness control programs, and single-visit prevalence measurements correlate significantly with the mean prevalence over the corresponding period. The USDA APHIS animal health information resources include guidance on implementing such surveillance within national disease control frameworks.

Anatomical Basis of Lesion Distribution

The distribution of lameness lesions is not random, and understanding the underlying anatomy explains why certain lesions predominate. The hindlimb bears a greater proportion of body weight during locomotion, and within the hind foot, the lateral claw bears more weight than the medial claw. This weight distribution, combined with the biomechanics of the bovine digit, predisposes the lateral claw of the hind foot to sole ulcers and white line disease.

The skin of the interdigital space and the heel region is the second major site of pathology, with digital dermatitis being the most common skin lesion. The deep sequencing analysis of digital dermatitis lesions demonstrated that the bacterial microbiota progresses through systematic changes correlated with lesion stage, with Treponema species predominating in advanced lesions. This microbial progression has diagnostic relevance: early digital dermatitis lesions may be subtle and easily missed without careful interdigital examination, while advanced lesions are readily apparent and often associated with characteriztic pain responses.

Standing Examination and Weight-Bearing Assessment

The standing examination begins before the cow is restrained. Observe the cow at rest in the stall or pen, noting the position of the affected limb. A cow with claw horn disease typically shifts weight away from the affected claw, often standing with the affected limb slightly forward or to the side. The degree of weight-bearing asymmetry provides a crude but useful measure of pain severity.

Palpation of the limb while the cow is standing adds further localizing information. The digital pulse is assessed by compressing the digital artery at the level of the fetlock, and increased pulse amplitude suggests active inflammation within the foot. Skin temperature is assessed by comparing the affected limb with the contralateral limb, using the back of the hand over the coronary band and pastern. Asymmetric warmth supports a diagnosis of claw horn disease or digital dermatitis, while symmetric findings suggest a bilateral condition or an upper limb problem.

Regional Examination of the Foot

The regional examination proceeds systematically from the coronary band to the sole. The coronary band is inspected for swelling, redness, and separation of the horn from the skin, findings that accompany sole ulcers and white line abscesses. The interdigital space is examined for the characteriztic strawberry-like lesions of digital dermatitis and for interdigital necrobacillosis, which produces marked swelling and a characteriztic odor.

Hoof testers are applied systematically across the sole, heel, and white line. The response is graded as negative, mild, or marked, and the location of the positive response is recorded precisely. A marked response over the typical sole ulcer site, at the sole-heel junction axial to the weight-bearing surface, strongly supports that diagnosis. A positive response along the white line suggests white line abscess or separation. The MSD Veterinary Manual provides detailed descriptions of these lesions and their characteriztic responses to hoof testers.

Decision to Lift the Foot

The decision to lift the foot for definitive examination is based on the cumulative evidence from locomotion scoring, standing examination, and hoof tester response. When the history and examination point clearly to claw horn disease, the foot should be lifted and examined directly. When the foot examination is unremarkable but lameness persists, the upper limb must be investigated.

The relationship between milk yield and lameness risk is complex. A position paper reviewing epidemiological and genetic studies found no phenotypic relationship between milk yield and the risk of lameness, although selection for higher milk yields may increase lactational incidence rates. This distinction matters clinically: high-producing cows are not inherently protected from lameness, and the diagnostic workup should proceed identically regardless of production level.

Lifting the Foot: Restraint and Preparation

The decision to lift a foot is not made lightly. It requires restraint that is safe for both cow and examiner, and it commits the clinician to a systematic examination that must be completed in one session. Re-lifting a foot because the examination was incomplete is a failure of planning, not of technique.

For most cows, a tilt table or a purpose-built hoof trimming chute provides the safest and most complete access. Rope restraint with the cow cast in lateral recumbency is an alternative when such equipment is unavailable, but it carries higher risk of muscle injury and ruminal bloat if the cow is held down for more than a few minutes. The choice of restraint depends on what is available on the farm and on the temperament of the cow. A cow that is fractious in the chute may be safer examined in a tilt table where her movement is fully constrained.

Before lifting, the clinician should have a working hypothesis about which claw is affected. This hypothesis comes from the standing examination and from the locomotion pattern. The hindlimb outer claw is the site of 65 percent of hindlimb lesions in the survey data from 37 dairy farms in England and Wales, with sole ulcers and white line disease predominating epidemiology of foot lesions in dairy cattle. The forelimb distribution is less skewed, but the medial claw is more frequently affected in the forelimbs. These priors guide where the examination starts, but they do not replace a complete inspection of all four claws.

Once the foot is lifted, the examination proceeds in a fixed order. Clean the sole and interdigital space with water and a brush. Examine the skin of the interdigital space and the coronary band before any trimming is performed. Digital dermatitis lesions are often visible as circumscribed, erosive, or proliferative areas on the skin, and their appearance is altered once the horn is trimmed or the foot is scrubbed aggressively deep sequencing analysis of bovine digital dermatitis microbiota. Note the presence of interdigital growths, foreign bodies, or interdigital necrobacillosis lesions before they are obscured by debris.

Trim the sole only as much as needed to expose the horn. Over-trimming thins the sole and can convert a mild lesion into a painful one. Use a hoof knife to remove loose horn and a grinder for gross reduction of overgrown walls. Examine the sole surface for discoloration, hemorrhage, abscess tracts, and separation at the white line. Palpate the sole with thumb pressure to identify areas of softening or pain response. A cow that flinches or withdraws the limb when a specific area is pressed has localized the lesion for you.

Diagnostic Blocks in the Bovine Limb

Perineural anesthesia is the most reliable method for confirming the source of lameness when the lesion is not visible on the lifted foot. The technique is straightforward in the hindlimb. The clinician palpates the abaxial surface of the distal metatarsus and infiltrates local anesthetic around the medial and lateral plantar nerves at the level of the distal third of the metatarsus. This block desensitizes the foot distal to the fetlock, including the heel, sole, and interdigital space.

The block is performed with the foot held by an assistant or with the cow in a chute. A 20 gauge, 2.5 cm needle is used, and 5 to 8 mL of local anesthetic is deposited at each site. The cow is walked after a 10 minute interval. If the lameness resolves or markedly improves, the lesion is within the foot. If the lameness persists unchanged, the source is proximal to the block, and the examination must move up the limb.

The dorsal nerve block at the level of the proximal interphalangeal joint is used when the standard plantar block does not abolish lameness but the clinician still suspects a foot lesion. This block desensitizes the dorsal structures of the digit, including the coronary region and the dorsal laminae. It is particularly useful for suspected laminitis-related lesions or dorsal wall abscesses.

In the forelimb, the palmar digital nerves are blocked at the level of the distal metacarpus. The approach is analogous to the hindlimb, with the clinician infiltrating around the medial and lateral palmar nerves. The block is technically easier in the forelimb because the limb is more accessible when the cow is in a chute.

Diagnostic blocks are not without limitations. A negative block does not rule out a lesion if the anatomy is variable or if the anesthetic volume is insufficient. A positive block confirms that the lesion is distal to the block site but does not identify the specific lesion. The block is a localization tool, not a diagnostic endpoint. It must be followed by a thorough examination of the desensitized region, including radiography if the cause remains obscure.

Imaging in the Lame Dairy Cow

Radiography is indicated when the physical examination identifies a problem that cannot be fully characterized by inspection and palpation. Suspected fractures, septic arthritis, osteomyelitis, and deep foreign bodies are the primary indications. The foot is radiographed with the cow standing on a cassette holder or with the limb positioned on a table. Dorsoplantar, lateromedial, and oblique projections are standard. The clinician should have a low threshold for imaging the contralateral limb for comparison, as subtle lesions are easier to identify when a normal reference is available.

Ultrasonography has a narrower role in bovine lameness diagnosis. It is useful for evaluating soft tissue swelling in the distal limb, particularly for distinguishing cellulitis from abscess formation. The flexor tendons and the digital cushion can be assessed, though the anatomy is more challenging to image than in the horse. The technique is operator-dependent and is best reserved for cases where the physical examination suggests a soft tissue lesion that radiography cannot characterize.

Advanced imaging, including computed tomography and magnetic resonance imaging, is available at some referral institutions and is increasingly used for complex foot lesions. These modalities are indicated when the lesion is not identified by conventional means and the economic value of the cow justifies the cost. They are not part of the routine farm workup.

Documenting the Findings

The examination is not complete until the findings are recorded. A standardized record form ensures that no region is overlooked and that the information is comparable across examinations. The record should include the cow identification, the date, the locomotion score, the limb affected, the claw affected, the lesion type using a standard nomenclature, and the treatment administered. Photographs of the lesion before and after trimming are valuable for tracking response to therapy and for client communication.

The lesion nomenclature should follow an established system. The five-point scale for locomotion scoring is the most widely used and provides a consistent basis for assessing lameness severity incidence and prevalence of lameness in dairy cattle. Lesion types should be recorded using the standard terms: sole ulcer, white line disease, digital dermatitis, interdigital necrobacillosis, toe ulcer, and heel horn erosion. Vague descriptions such as "foot sore" are not acceptable in a professional record.

The record also serves a herd-level function. Repeated examinations of the same cow document the progression of chronic lesions and the response to treatment. Aggregated records across the herd identify the predominant lesion types and the seasonal patterns of disease, which inform prevention programs. The survey data from 37 farms showed that the prevalence of lameness measured at a single midsummer or midwinter visit correlated with the mean prevalence over the corresponding period, which supports the use of periodic locomotion scoring as a herd monitoring tool incidence and prevalence of lameness in dairy cattle.

Decision Points That Change the Approach

The diagnostic sequence is not rigid. Several factors alter the correct course of action.

The cow's stage of lactation and production level influence the urgency of the workup. A cow in early lactation with a severe lameness warrants immediate examination because the condition affects feed intake and energy balance. The relationship between milk yield and disease risk is complex, and the evidence does not support a simple conclusion that high yielders are more prone to lameness lactational performance and production disease risk00110-6). The clinical decision is driven by the individual cow's condition, not by her production record.

The availability of restraint equipment changes the examination strategy. A farm with a well-maintained tilt table allows a complete four-claw examination in every case. A farm with only rope restraints may force the clinician to prioritize the most likely claw based on the standing examination and to limit the time the cow is down. This is a pragmatic compromise, but it must be documented as such.

The presence of systemic signs changes the differential list. A cow with fever, inappetence, and a swollen limb is more likely to have septic arthritis or a deep infection than a cow with a normal temperature and a localized sole lesion. The systemic examination is part of the lameness workup, not a separate exercise.

The response to treatment is a diagnostic test in itself. A cow that does not improve within 48 to 72 hours of appropriate therapy for the identified lesion should be re-examined. The initial diagnosis may have been incomplete, or a second lesion may be present. The record from the first examination is essential for this reassessment.

Recognized Complications and Failure Modes

The most consequential failure in lameness diagnosis is not a missed lesion but a misattributed one. A cow with a sole ulcer and concurrent digital dermatitis may improve after topical therapy yet remain lame from the ulcer, leading the clinician to conclude the dermatitis was the sole problem. The reverse sequence is equally common: a painful claw horn lesion is treated, the foot is bandaged, and the dermatitis hidden beneath the bandage is discovered only when the bandage is changed.

Early detection of diagnostic failure depends on scheduled reassessment. A cow that has not improved within 72 hours of treatment requires re-evaluation of the original diagnosis, not repetition of the same treatment. Persistent weight-bearing lameness after apparently adequate claw horn debridement should prompt reconsideration of the contralateral claw, the proximal limb, or the axial structures of the foot.

Septic conditions of the digit carry specific failure modes. A retroarticular abscess can be missed when the clinician focuses on the sole and fails to palpate the heel bulb and coronary band junction. Septic arthritis of the distal interphalangeal joint is frequently diagnosed late because the early signs, mild lameness and slight coronary swelling, are attributed to claw horn disease. Deep digital sepsis that has extended into the tendon sheath produces a characteriztic swelling proximal to the fetlock, but only if the clinician palpates that region as part of the routine examination.

The table below summarizes common diagnostic failures and the discriminating checks that separate them.

Common Errors and Corrective Actions

The most frequent error in teaching settings is premature lifting of the foot. Students and less experienced clinicians often lift the foot before completing the standing examination, losing the opportunity to observe weight distribution, pelvic movement, and stride length. The corrective action is to establish a discipline of examination order: observe at rest, observe at walk, assess the limb from hoof to hip, then lift the foot.

A second error is failure to examine the contralateral limb. Lesion distribution data from a large survey of dairy farms in England and Wales showed that hindlimb lesions accounted for 92 percent of lameness episodes, with 65 percent in the outer claw Murray et al., 1996. The outer claw of the hindlimb is so commonly affected that clinicians may stop after finding one lesion there, missing a second lesion in the same foot or the opposite limb. The corrective action is to examine all four claws of the affected foot and to lift the contralateral hind foot when the presenting lameness is severe or the initial findings do not explain the degree of lameness.

A third error is over-reliance on hoof testers. A positive response to pressure over the sole confirms pain but does not localize the lesion to a specific structure. The clinician must integrate hoof tester findings with visual inspection, palpation, and the response to diagnostic anesthesia.

A fourth error is misreading the significance of digital dermatitis. Because digital dermatitis is highly prevalent and a leading cause of lameness worldwide Krull et al., 2014, clinicians may attribute all lameness to this condition. The corrective action is to remember that digital dermatitis produces characteriztic lesions that are visible on inspection, and that a cow with a painful sole lesion will still be lame after the dermatitis is treated.

Limitations of the Current Evidence

The evidence base for lameness diagnosis in dairy cattle rests heavily on descriptive epidemiology. The landmark survey of 37 farms in England and Wales provided lesion distribution data that remains foundational, but it was conducted in the early 1990s and reflects the housing, flooring, and management systems of that era Clarkson et al., 1996. Modern freestall designs, rubber flooring, and different bedding materials may alter lesion prevalence and distribution.

The relationship between milk yield and lameness risk remains contested. A position paper reviewing epidemiological and genetic studies found no phenotypic relationship between milk yield and lameness risk, but concluded that selection for higher milk yield would probably increase the lactational incidence rate of lameness Ingvartsen et al., 200300110-6). This distinction between phenotypic and genetic relationships has practical implications: a clinician cannot predict an individual cow's lameness risk from her milk production, but herd-level genetic selection decisions may influence lameness prevalence over time.

Expert opinion still differs on the value of routine diagnostic imaging. Some clinicians advocate radiography for any non-responsive claw horn lesion, while others reserve imaging for cases with obvious joint involvement. The evidence base does not resolve this disagreement, and the decision will depend on case chronicity, available equipment, and economic considerations.

Referral, Consultation, and Reporting

Referral is warranted when the diagnostic workup cannot be completed on farm. This includes cases requiring advanced imaging such as computed tomography or magnetic resonance imaging, cases where general anesthesia is needed for a complete examination, and cases where the clinician lacks the equipment or experience to perform a particular diagnostic procedure.

Specialist consultation is appropriate for chronic lameness that has failed to respond to apparently correct treatment, for suspected neoplastic conditions, and for cases where the clinician is uncertain whether the lesion is in the foot or the proximal limb. Laboratory involvement may be indicated when infectious causes are suspected beyond the common digital dermatitis and foot rot pathogens, particularly when lesions are atypical or non-responsive to standard therapy.

Regulatory reporting obligations vary by jurisdiction. The WOAH terrestrial animal health standards address notifiable diseases that may present with lameness, including foot-and-mouth disease and vesicular stomatitis. The USDA APHIS animal health information resources describe national surveillance and reporting requirements in the United States. Clinicians should be familiar with the reporting obligations in their own jurisdiction and should maintain a low threshold for suspecting vesicular diseases when multiple animals present with acute severe lameness and foot lesions, particularly if lesions involve the coronary band or interdigital skin.

Frequently Asked Questions

How Do I Localize a Lesion When the Cow Will Not Bear Weight on the Limb at All?

Complete non-weight-bearing lameness usually indicates a severe, painful process. Start with the foot, since over 90% of lameness lesions in dairy cattle involve the hindlimb, with the outer claw most frequently affected. Examine the coronary band for swelling, heat, or disruption, and check the interdigital space for necrobacillosis or foreign bodies. If the foot appears normal, palpate the proximal limb for fractures, joint effusion, or muscle atrophy. A diagnostic block can differentiate foot pain from upper limb pain, but use caution: a severely lame cow may resent handling, and sedation may be needed before regional anesthesia. If no lesion is found after lifting and examining the foot, radiography of the distal limb is indicated before assuming an upper limb problem.

What Is the Minimum Equipment Needed to Perform an Adequate Lameness Examination on Farm?

A functional hoof examination requires a well-lit, non-slip area, hoof trimmers, a hoof knife, and a means of lifting the foot. Tilt tables or hoof trimming chutes are ideal, but ropes and a head gate can suffice for hindlimb examination in many cows. A flashlight or headlamp is essential for inspecting the sole and interdigital space. You also need a clean bucket of water and a brush to remove manure before inspection. For diagnostic blocks, carry local anesthetic, syringes, needles, and a marker to record the block site. If radiography is available, a portable machine with a stand for the foot is valuable. When equipment is limited, prioritize the standing examination and locomotion scoring, as these often narrow the differential list before the foot is lifted.

How Do I Distinguish Claw Horn Lesions from Digital Dermatitis When Both Are Present?

Claw horn lesions and digital dermatitis frequently coexist, and each can cause lameness independently. Digital dermatitis typically presents as a circumscribed, strawberry-like lesion on the plantar skin just above the heel bulbs, often with a characteriztic odor. Claw horn lesions, such as sole ulcers or white line disease, are found on the weight-bearing surface of the claw. When both are present, determine which lesion is more likely to explain the severity of lameness. A superficial digital dermatitis lesion in an early stage may not cause marked lameness, whereas a sole ulcer at the typical site usually does. Apply gentle pressure to each lesion with a hoof tester. The lesion that elicits the strongest withdrawal response is the primary pain source. Treat both, but document which one you judge to be the principal cause.

What Should I Do When the Herd Has a High Lameness Prevalence but Individual Cows Look Normal on Examination?

When individual examinations do not reveal lesions, the problem is likely environmental or nutritional instead of a single cow issue. Review the housing system, focusing on stall dimensions, bedding depth, and alleyway surfaces. Cows that spend excessive time standing on concrete or in poorly bedded stalls are at higher risk for claw horn lesions. Assess cow comfort by observing lying behavior and measuring stall occupancy. Body condition scoring can identify cows that are excessively thin or fat, both of which are associated with lameness risk. Review the ration for energy and mineral balance, since metabolic imbalance is a proposed mechanism linking production diseases. Locomotion scoring the entire herd will quantify the problem and help monitor the response to management changes.

How Should I Record Lameness Findings So That the Records Are Useful for Herd-Level Monitoring?

Record each lameness event with the cow identification, date, limb affected, lesion type, and lesion location using a standardized coding system. Include the locomotion score at the time of diagnosis and the treatment administered. Photographs of lesions are valuable for tracking recurrence and for training staff. Maintain a herd-level register that summarizes lameness incidence and prevalence by month and by parity. This allows you to detect seasonal patterns and to evaluate the effect of interventions such as foot bathing or trimming schedules. The mean annual incidence of lameness in dairy herds has been reported at over 50 new cases per 100 cows, so a monitoring system is essential to distinguish normal variation from a genuine problem. Share summaries with the herd manager at regular intervals.

How Do I Explain the Diagnostic Plan to a Herd Owner Who Wants Immediate Treatment?

Explain that accurate lesion localization is the first step toward effective treatment and prevention. A cow that is treated for the wrong lesion will not improve, and the underlying problem will persist. Describe the examination process in sequence: locomotion scoring, standing inspection, lifting the foot, and targeted palpation. Emphasize that some cases require diagnostic anesthesia or imaging to confirm the source of pain, and that this investment prevents repeated treatments and prolonged lameness. Frame the discussion around the economic impact of lameness, including reduced milk yield and increased culling risk. Note that early detection and prompt treatment reduce the duration of lameness cases, as demonstrated in field surveys. Reassure the owner that the diagnostic approach is systematic and that treatment follows directly from the findings.

Related Clinical & Scientific Guides

• Rumen Health Assessment in Dairy Cows: Clinical and Subclinical Indicators
• Mastitis Control Programs in Dairy Herds: Monitoring and Prevention
• Swine Nutrition and Health: Feed-Related Disease Diagnosis

References and Further Reading

• Deep sequencing analysis reveals temporal microbiota changes associated with development of bovine digital dermatitis.. 2014.
• On the relationship between lactational performance and health: is it yield or metabolic imbalance that cause production diseases in dairy cattle? A position paper00110-6). 2003.
• Invited review: The welfare of dairy cattle--key concepts and the role of science.. 2009.
• Incidence and prevalence of lameness in dairy cattle.. 1996.
• Survey of management practices on reproductive performance of dairy cattle on large US commercial farms.. 2006.
• Epidemiology of lameness in dairy cattle: description and analysis of foot lesions.. 1996.
• USDA APHIS Animal Health Information. USDA APHIS.
• FAO Animal Production and Health. FAO.
• MSD Veterinary Manual, Professional Edition. MSD Veterinary Manual.

Related Articles

• Diagnostic Approach to Lameness in Feedlot Cattle: Differentiating Foot Rot from Other Causes
• Sheep Flock Health: Diagnostic Approach to Lameness
• Dairy Calf Health: Diagnostic Approach to Neonatal Diarrhea
• Dairy Cow Nutrition: Diagnostic Approach to Metabolic Disorders
• Lameness Scoring Systems for Dairy Cattle: Application and Interpretation

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.