# Cattle Corral Planning: Sizing and Configuration ## Key Takeaways - **Capacity Planning is Peak Load Driven**: Corral holding pen sizing should be based on the largest group of animals anticipated for a single working session, not the total herd size, to ensure adequate space per animal (25-35 sq ft for mature cows, 15-20 sq ft for calves) and prevent overcrowding. - **Working Alley and Crowd Pen Design Optimize Flow**: A 24-30 inch wide working alley for mature cattle and a circular crowd pen with a 12-16 foot radius facilitate efficient, low-stress movement by preventing balking and reducing the need for excessive prodding. - **Strategic Gate and Alley Configuration Enhances Safety**: Gates should be appropriately sized for access (12-16 ft for trailers, 4-6 ft for personnel) and positioned to swing flat against fences, while working alleys require a straight 10-12 foot section before the squeeze chute to encourage calm entry. - **Site Selection and Drainage Mitigate Health Risks**: Corrals should be sited at least 100 feet from water sources and public roads, with a 2-4% surface slope away from working areas, to minimize biosecurity risks, dust, noise, and prevent mud accumulation that contributes to foot and respiratory diseases. - **Fence Height and Material Selection Ensure Containment**: Fence heights should be tailored to animal class (5-6 ft for mature cattle, taller for bulls), with solid panels (at least 4 ft high) recommended for crowd pens and working alleys to reduce visual distractions and improve handler safety. --- Planning a cattle corral is one of the most important investments you will make in your beef operation. A well designed corral saves hours of labor, reduces stress on cattle and people, and improves safety for everyone involved. This guide covers the full planning process from initial sizing through final configuration. It is written for beef cattle producers who are building a new corral, remodeling an existing one, or trying to figure out why their current setup is not working well. The decisions you make during the planning phase will affect your operation for decades. Concrete does not move easily and steel panels are expensive to rearrange. Getting the sizing and layout right the first time is far cheaper than fixing mistakes later. This guide walks through capacity calculations, working facility dimensions, drainage considerations, gate placement, and the common configuration mistakes that plague poorly designed corrals. ## At a Glance - **Corral capacity rule of thumb**: Provide 20 to 30 square feet per cow in a holding pen, 15 to 20 square feet per calf, and 30 to 50 square feet per cow-calf pair for short term holding. - **Working alley width**: 24 to 30 inches for mature cattle, 18 to 24 inches for calves and yearlings. - **Squeeze chute access**: Plan for at least 12 feet of straight alley before the chute so cattle approach calmly. - **Buddy pen or tub**: A circular or semicircular tub with a radius of 12 to 16 feet improves cattle flow and reduces the need for excessive prodding. - **Crowd pen size**: Allow 8 to 10 square feet per animal in the crowd pen that feeds the working alley. - **Setback from other structures**: Place the corral at least 100 feet from feed storage, water sources, and public roads to reduce dust, noise, and biosecurity risks. - **Drainage**: Slope the corral surface 2 to 4 percent away from working areas to prevent mud and manure buildup. - **Gate widths**: Use 12 to 16 foot gates for truck and trailer access, 10 to 12 foot gates for tractor access, and 4 to 6 foot walk-through gates for people. - **Fence height**: Use 5 to 6 foot high panels for cattle, taller in areas where bulls are handled. ## Sizing Your Corral for Your Herd The first step in corral planning is determining how many animals the corral must hold at one time. This number is not always your total herd size. Think carefully about the largest group you will realistically work at once. A producer with 200 cows might only wean and process 50 calves at a time, which changes the required capacity significantly. ### Calculate Your Peak Load Start by listing every job the corral will support. Common tasks include: - Routine vaccination and health checks - Pregnancy checking - Weaning - Branding - Loading and unloading trucks - Separating sick animals - Artificial insemination - Hoof trimming - Bull testing and conditioning For each task, estimate the largest number of animals you will handle in a single session. The biggest number you come up with is your peak load. Size the holding pens for this number, not for the total herd count. If you run a fall calving herd and wean in the spring, your weaning group might be 80 calves while the herd total is 120 cows. The corral needs to accommodate those 80 calves plus the cows you will sort through during the same working session. Account for the fact that you might need to hold cows and calves in separate pens simultaneously. ### Square Footage Guidelines by Animal Class The amount of space each animal needs depends on its size, the duration of confinement, and the weather conditions in your area. These figures assume short term holding of less than 24 hours. If animals will stay in the corral longer, add 20 to 30 percent more space per animal. | Animal Class | Square Feet per Head | |---|---| | Mature cow, 1200 to 1500 pounds | 25 to 35 | | Bull, mature | 40 to 50 | | Yearling, 600 to 900 pounds | 20 to 25 | | Calf, 300 to 600 pounds | 15 to 20 | | Cow-calf pair | 40 to 50 | These numbers cover the animals standing or lying down in a holding pen. They do not account for feed bunks, water tanks, or alley space inside the pen. Add extra space for those features. Hot and humid climates require more space per animal than cold, dry climates. Cattle dissipate heat through their skin and need room for air movement around their bodies. In the southern United States, add 10 to 15 percent to the square footage recommendations. In northern states with cool summers, the baseline figures work well. ### Pen Dimensions and Shape Square pens are easier to build than long narrow ones and they allow cattle to move around freely. A pen that is 50 feet wide and 100 feet long holds the same number of animals as a 70 by 70 foot pen, but the square version works better for sorting and gathering. For holding pens, aim for a width that is at least half the length. This shape prevents cattle from packing into one end and makes it easier for people to move through the pen on foot or horseback. The maximum practical distance for moving cattle from a large holding pen to the working alley is about 150 feet. Beyond that distance, cattle become harder to move and you will spend more time and energy pushing them forward. If your layout requires a longer travel distance, break the holding area into multiple smaller pens that each feed into the working facility. ### Water and Feed Space in Holding Pens If cattle will be in the corral for more than a few hours, provide water. A single water tank with 2 to 3 feet of accessible perimeter per animal works for short term holding. For longer stays, increase this to 3 to 4 feet per animal. Feed space in holding pens is less critical because most corral work sessions are short. If you are holding cattle overnight before a morning processing session, provide 18 to 24 inches of bunk space per animal. This prevents [dominant](/blog/careers/dominant-definition-biology) animals from eating more than their share and keeps the group calm. ## Working Facility Configuration The working facility is the heart of the corral system. This is where cattle are restrained, examined, vaccinated, and processed. The configuration of this area determines how efficiently you can work cattle and how safe the experience is for both animals and handlers. ### The Crowd Pen The crowd pen, also called the gathering pen or tub, is the small enclosure that funnels cattle into the single-file working alley. Its design has a major impact on cattle flow. A circular or semicircular crowd pen with a radius of 12 to 16 feet works best for most operations. The curved wall gives cattle a natural path to follow and prevents them from seeing the chute and balking at the end of the alley. The solid walls block distractions from outside the corral. The crowd pen should hold 8 to 10 animals at a time. This is enough to keep the working alley full without creating so much pressure that cattle become agitated. If you are working large groups, you can refill the crowd pen as animals move through the chute. The floor of the crowd pen should be sloped slightly toward the working alley entrance. A slope of 1 to 2 percent encourages cattle to move forward and helps with drainage. The entrance to the working alley should be the same width as the alley itself, with no step up or down. ### Working Alley Dimensions The working alley, also called the race or chute alley, is the single-file passage that leads cattle to the squeeze chute. Its width is critical. Too wide and cattle turn around. Too narrow and large animals get stuck. Use these width guidelines: | Animal Class | Alley Width | |---|---| | Mature cows and bulls | 26 to 30 inches | | Yearlings | 22 to 26 inches | | Calves | 18 to 22 inches | Measure the alley width at the bottom, not the top. Many commercial alleys taper slightly, being wider at the top to accommodate the animal's shoulders and narrower at the bottom to prevent feet from slipping through. The working alley should be at least 20 feet long, with 30 to 40 feet being ideal. This length allows several animals to stand in line and gives each animal time to settle before reaching the chute. A longer alley also means you can process animals continuously without waiting for the next one to arrive. The last 10 to 12 feet of alley before the squeeze chute should be perfectly straight. Cattle need this straight section to see the chute and commit to entering it. If the alley curves right up to the chute, animals will balk and you will spend extra time pushing them forward. ### Squeeze Chute Placement Position the squeeze chute so that the animal exits into a clear area where it can move away from the facility. This prevents processed animals from blocking the entrance and creating confusion for the next animal in line. The chute should sit on a firm, level base. Concrete pads work best because they do not shift under the weight of the chute and the animal. If you use gravel, compact it thoroughly and consider pouring a small concrete pad under the chute legs to prevent settling. Allow at least 8 feet of clearance behind the chute for the handler to access the animal's rear for pregnancy checks, artificial insemination, or hoof work. Many producers also add a palpation cage behind the chute for these procedures. ### Sorting Gates and Pens A good corral design includes sorting pens that let you separate cattle by sex, age, health status, or destination. Plan for at least three sorting pens: one for animals that need further treatment, one for animals ready to return to pasture, and one for animals being loaded or held for transport. Each sorting pen should be large enough to hold the largest group you will sort into it. If you are weaning 80 calves and sorting out 10 that need treatment, the treatment pen only needs to hold 10 animals, but the return-to-pasture pen needs to hold 70. Sorting gates should be positioned so that the handler can operate them without leaving the working area. A lever or pull rod system that extends from the sorting alley to the handler's position saves many steps during a long processing session. ## Gate Placement and Sizing Gates are the control points of your corral system. Poor gate placement creates bottlenecks, safety hazards, and wasted time. Good gate placement makes every task easier. ### Access Gates You need at least one gate wide enough for a stock trailer or truck to enter the corral area. This gate should be 12 to 16 feet wide and positioned so that the vehicle can approach straight on without backing around corners. A separate gate for tractor access is useful for cleaning pens, moving hay, or hauling manure. This gate should be 10 to 12 feet wide and positioned away from the working facility where tractor traffic will not disturb cattle. Walk-through gates for people should be 4 to 6 feet wide. These small gates let you enter and exit pens without opening the large equipment gates. Position them near the working facility so you can move quickly between the chute, the crowd pen, and the sorting pens. ### Internal Gates Internal gates divide the corral into functional areas. Each gate should be positioned to create a natural flow from one area to the next. Avoid placing gates in corners where cattle can trap people against the fence. Gates that open into a pen should swing toward the fence line when fully open. This prevents the gate from blocking the pen interior and gives you a clear path when moving cattle. Gates that open into an alley should swing flat against the alley wall. Use positive latching mechanisms on all gates. A gate that swings open accidentally can let cattle escape or trap a person against the fence. The latch should be operable with one hand, because you will often be holding a sorting stick or lead rope in the other hand. ### Gate Height Match gate height to fence height. A 5 foot fence needs a 5 foot gate. Taller is better for bull pens and areas where cattle might try to jump. Gates that are too short create a dangerous situation where cattle can hook their heads over the top or attempt to clear the fence. ## Fence Height and Construction Fence height depends on the class of cattle you handle. A fence that contains cows will not necessarily contain bulls or excited yearlings. | Animal Class | Minimum Fence Height | |---|---| | Calves and weaned calves | 4.5 to 5 feet | | Mature cows | 5 to 5.5 feet | | Bulls | 5.5 to 6 feet | | Excited or recently handled cattle | 6 feet | Solid fencing works better than open pipe or wire fencing in the working areas of the corral. Solid panels block the cattle's view of distractions outside the corral, which keeps them calmer and easier to move. Use solid panels at least 4 feet high on the crowd pen, working alley, and the first 20 feet of the holding pens near the working facility. For the outer perimeter fence, you can use a combination of solid panels and pipe or cable fencing. The perimeter fence needs to be strong enough to contain cattle but does not need to block their view of the surrounding area. Many producers use 5 to 6 foot high pipe panels for the perimeter and reserve solid panels for the interior working areas. Set fence posts at a depth of at least 3 feet in most soil types. In sandy or wet soils, go deeper or use concrete footings. The post depth should be about one-third of the above-ground post height. A 6 foot fence needs posts set 3 feet deep. ## Drainage and Site Preparation Poor drainage turns a functional corral into a mud pit that is dangerous for cattle and people. Cattle that stand in mud for extended periods are more susceptible to foot problems and respiratory disease. Mud also makes it harder to move cattle, which increases stress and the risk of injury. ### Site Selection Choose a site with natural drainage away from the corral footprint. High ground is ideal because it allows water to flow away from the working areas. Avoid low spots where water collects after rain. The corral should be at least 100 feet from any water source such as a pond, stream, or well. This setback protects water quality from manure runoff and prevents cattle from accessing the water while confined. Keep the corral at least 100 feet from public roads to reduce the risk of cattle escaping onto the road and to minimize dust and noise complaints from neighbors. ### Surface Slope Grade the corral surface so that water drains away from the working facility. A slope of 2 to 4 percent (about 2 to 4 feet of drop per 100 feet of run) works well. The high point should be at the working alley and chute, with the slope carrying water toward the perimeter of the corral. The working alley and crowd pen should be the highest areas of the corral. This keeps the areas where cattle are handled the driest and most stable. The holding pens can be slightly lower, but they still need enough slope to drain. ### Surface Materials A well drained corral can use native soil as the surface if the soil is firm and does not turn to mud easily. Sandy or gravelly soils work well. Heavy clay soils do not drain well and will become muddy during wet weather. For heavy use areas such as the working alley, crowd pen, and the area around the squeeze chute, install a concrete pad. Concrete provides a firm, non-slip surface that is easy to clean and disinfect. It also prevents the soil from becoming compacted and muddy in these high traffic areas. If concrete is not in your budget, use compacted gravel or crushed rock. A base of 4 to 6 inches of compacted gravel topped with 2 inches of finer material creates a stable surface that drains well. You will need to add gravel periodically as it works into the soil. ### Manure Management Plan for manure removal when designing the corral. Holding pens will accumulate manure that needs to be removed regularly to maintain drainage and reduce fly breeding. Design the corral so that a tractor and loader can access every pen for cleaning. Consider where the manure will be stored. A compost pad or manure stacking area should be located away from the corral and water sources. Check your local regulations for manure storage requirements, as some areas have specific rules about setbacks and storage methods. ## Common Configuration Mistakes Many corral problems trace back to a handful of design errors. Recognizing these mistakes helps you avoid them in a new build and identify them in an existing corral that is not working well. ### Sharp Corners in the Working Alley A working alley with a sharp 90 degree turn forces cattle to make a sudden direction change while moving forward. Many cattle balk at these corners, especially if they cannot see what is on the other side. This leads to cattle backing up, turning around, or refusing to move. Use sweeping curves with a radius of at least 10 feet instead of sharp corners. A curved alley lets cattle maintain forward momentum and see where they are going. If you must have a corner, make it as wide and gradual as possible. ### Working Alley Too Wide An alley that is 36 to 40 inches wide seems like it would be easier for cattle to move through, but it creates problems. Cattle can turn around in a wider alley, which stops the flow of animals and requires someone to enter the alley to turn them back around. The correct alley width is one that is slightly narrower than the animal's body width. This prevents turning and encourages forward movement. For most mature beef cattle, that means 26 to 30 inches. ### Crowd Pen Too Large A crowd pen that holds 20 or 30 animals seems efficient because you do not have to refill it as often. However, a large crowd pen gives cattle too much room to move around and avoid the alley entrance. They can turn away from the alley and create a crowd that is hard to move. Keep the crowd pen sized for 8 to 10 animals. This small space creates gentle pressure that encourages cattle to move toward the alley. You will refill the pen more often, but each animal will move through the chute more readily. ### No Solid Sides on the Working Alley An alley with open pipe or cable sides allows cattle to see people, equipment, and other cattle moving around them. This visual stimulation keeps them alert and nervous, making them harder to handle. Solid sides on the working alley block these distractions and keep cattle focused on moving forward. The solid panels do not need to be full height. A solid panel 4 to 5 feet high blocks most visual distractions while allowing air movement and light from above. ### Gates That Open the Wrong Way A gate that opens into the path of cattle movement creates a barrier that cattle must work around. This slows the flow and can cause cattle to bunch up or balk. All gates in the working area should open flat against the fence line when fully open. This keeps the path clear and prevents the gate from becoming an obstacle. Check each gate location during the planning phase by visualizing the path of cattle movement. ### Insufficient Space Around the Chute The area around the squeeze chute is the most crowded part of the corral during processing. You need room for the chute operator, the person working the animal, and the veterinarian or technician performing procedures. Provide at least 8 to 10 feet of clear space on each side of the chute and 10 feet behind it. This space lets people move around safely and gives the veterinarian room to work. Cramped quarters around the chute lead to accidents and rushed procedures. ### No Consideration for Disabled or Down Cattle Every cattle operation eventually deals with a cow or calf that cannot walk through the working facility. This might be an animal with a broken leg, a severe metabolic problem, or a neurologic condition. Plan for this situation by including a pen or area where a disabled animal can be isolated and treated. This area should have solid footing, access for a tractor or vehicle, and enough space for a veterinarian to work. A loading ramp that can be lowered to ground level works well for moving disabled animals onto a trailer for transport. ## Decision Thresholds for Corral Upgrades Not every corral problem requires a full rebuild. Some issues can be fixed with targeted upgrades. Use these thresholds to decide whether to repair, modify, or rebuild your corral. ### Repair Versus Replace If your corral has structural damage such as broken welds, rusted panels, or leaning posts, evaluate whether the damage is isolated or widespread. A few broken welds can be repaired in place. Widespread rust and structural failure suggests the corral has reached the end of its service life. Steel panels that have lost significant metal thickness to rust cannot be reliably repaired. The metal will continue to corrode and the panel will fail again. Replace rusted panels rather than trying to patch them. Wooden corrals have a shorter service life than steel, typically 10 to 15 years depending on the wood species and climate. If the posts are rotting at ground level or the boards are splitting, plan for replacement. Wood that is still sound can be reinforced, but do not delay replacement when the structure is failing. ### Modification Versus Rebuild If your corral works well for most tasks but has one problem area, consider modifying that area before committing to a full rebuild. Common targeted modifications include: - Adding solid panels to an open-sided working alley - Narrowing an alley that is too wide - Relocating a gate that opens the wrong way - Adding a crowd pen tub to replace a square corner pen - Pouring a concrete pad under the chute and working alley These modifications are much cheaper than a new corral and can solve most functional problems. Only consider a full rebuild when the corral has multiple problems that cannot be fixed independently. ### Capacity Thresholds If you are regularly overcrowding your corral, either because the herd has grown or because you are working larger groups than the corral was designed for, you need to expand. Overcrowded corrals are dangerous for cattle and people, and they increase the risk of injury and disease transmission. Add holding pen capacity rather than trying to make existing pens work harder. It is usually easier to add new pens adjacent to the existing corral than to enlarge existing pens. The new pens should connect to the existing working facility through a lane or alley. ### Safety Thresholds If you or your family have had close calls or injuries in the corral, take those seriously. A corral that causes people to take shortcuts, work cattle alone, or use excessive force is a safety hazard. The cost of a corral upgrade is small compared to the cost of a serious injury. If the corral layout makes it difficult to move cattle without entering the pen, add remote-operated gates or reposition the alley entrance. If you cannot operate the squeeze chute safely from the animal's head, replace the chute. ## Monitoring and Recordkeeping A corral is infrastructure, not a crop. You do not monitor it in the same way you monitor pasture condition or cattle weight gain. However, regular inspection and maintenance keep the corral safe and functional. ### Seasonal Inspection Checklist Inspect the corral at least twice per year, once in the spring before heavy use and once in the fall before weaning season. Walk the entire corral and check: - Gate hinges and latches for wear and proper operation - Welds on panels and posts for cracks - Post stability and depth - Concrete surfaces for spalling or cracking - Gravel surfaces for erosion and low spots - Drainage paths for blockages - Corrosion on steel components - Rot on wooden components - Loose bolts or fasteners Fix small problems when you find them. A loose hinge that takes 10 minutes to tighten becomes a broken gate that takes hours to replace if you ignore it. ### Maintenance Records Keep a simple log of corral maintenance. Note the date, what you inspected, what you found, and what repairs you made. This log helps you track the condition of the corral over time and plan for future upgrades. A basic log entry might look like this: Date: March 15 Inspection: Spring walkthrough Findings: Gate 3 latch is stiff, needs lubrication. Gravel in holding pen 2 is thin near the water tank. One weld on the crowd pen panel has a small crack. Repairs: Lubricated gate latch. Added 2 yards of gravel to holding pen 2. Ground down and rewelded the cracked weld. ### Cattle Behavior Records Pay attention to how cattle move through the corral during working sessions. If you notice cattle balking at a particular spot, turning around in the alley, or refusing to enter the crowd pen, make a note of it. These behavioral cues often point to design problems that you can fix. A pattern of cattle balking at the same location suggests a visual distraction or a design flaw. A pattern of cattle turning around in the alley suggests the alley is too wide. A pattern of cattle refusing to enter the crowd pen suggests the pen is too large or the entrance is poorly positioned. ### When to Call a Veterinarian or Extension Agent Most corral planning is a do-it-yourself project, but there are times when professional help is worth the cost. Call your veterinarian if you are designing a corral for large animal handling and are unsure about the safety of the layout. Veterinarians see the results of poor corral design in their practice and can offer practical advice about what works. Call your local extension agent if you are planning a new corral and want to learn about cost sharing programs, low-stress handling principles, or local regulations that affect corral construction. Extension agents often have access to publications and resources that can help with the planning process. If you are building a corral for a large operation, consider hiring a professional livestock facility designer. These specialists can create a layout that maximizes efficiency and safety. The design fee is typically a small fraction of the construction cost and can save you money by avoiding mistakes. ## Frequently Asked Questions **How much does it cost to build a cattle corral?** The cost varies widely depending on the size, materials, and features you choose. A basic corral with pipe panels and a manual squeeze chute might cost $5,000 to $15,000 for a small operation. A larger facility with concrete work, a hydraulic chute, and multiple sorting pens can cost $50,000 or more. Get quotes from local suppliers for materials and consider doing the construction yourself to save on labor costs. **Can I build a corral out of wooden posts and boards instead of steel panels?** Yes, wooden corrals are common and can work well. Use pressure treated posts set at least 3 feet deep and 2 by 6 or 2 by 8 boards for the fence. The boards should be on the inside of the posts so cattle push against the posts rather than pulling the boards off. Wooden corrals require more maintenance than steel but are often cheaper to build initially. **How many acres do I need for a cattle corral?** A corral does not require much land. A complete working facility for a 100 cow herd typically occupies less than one acre. The corral footprint is usually 100 by 150 feet or smaller, depending on the configuration. The key is finding a well drained site with good access, not having a large amount of land. **What is the best corral shape or layout?** The best layout depends on your operation, but the most efficient designs share common features. They have a circular or semicircular crowd pen feeding a straight working alley that leads to the squeeze chute. Sorting pens radiate from the chute area so processed cattle can be directed to the correct pen without moving them through other cattle. The layout should allow one person to process cattle safely, with the option to add helpers when needed. **How do I keep my corral from getting muddy?** Start with good drainage. Grade the corral so water flows away from the working areas and choose a site that does not collect water. Install a concrete pad in the highest traffic areas. Add gravel to holding pens and replenish it as it works into the soil. Move cattle out of the corral when they are not being worked so the ground has time to recover. **What size squeeze chute do I need?** Match the chute to the size of cattle you handle. A standard adult chute handles cows and bulls weighing up to 2,000 pounds or more. A calf chute is smaller and works for calves and yearlings. If you handle both cows and calves, look for an adjustable chute that accommodates both sizes, or plan to have a separate calf chute for processing calves. **How many people do I need to work cattle through a corral?** A well designed corral can be operated by one person, though the work is easier and safer with two. The minimum setup has one person operating the squeeze chute and one person working the animals. If you are processing large groups, a third person can help move cattle from the holding pens to the crowd pen. Some producers work cattle alone, but this is not recommended for safety reasons. **How do I introduce cattle to a new corral?** Cattle that have never been in a corral will be nervous the first time. Move them in calmly and give them time to explore before you start working them. Put them in a large holding pen with water and let them settle for a few hours or overnight. The next day, move them through the working facility slowly without processing them. This familiarizes them with the corral and reduces stress during the actual working session. ## Related Farming Guides This section will be populated with links to related farming guides on cattle handling, facility design, herd health management, and low-stress livestock handling techniques. ## Related Clinical & Scientific Guides * [Cattle Head Gate Selection and Adjustment](/knowledge/animal-farming/beef-cattle/cattle-head-gate-selection-and-adjustment) * [Beef Cattle Handling Facility Flow](/knowledge/animal-farming/beef-cattle/beef-cattle-handling-facility-flow) * [Beef Cattle Maternity Pen Design: Comfort and Monitoring](/knowledge/animal-farming/beef-cattle/beef-cattle-maternity-pen-design-comfort-monitoring) ## References - Beef Cattle Research Council: https://www.beefresearch.ca/ - USDA APHIS Cattle Health: https://www.aphis.usda.gov/livestock-poultry-disease/cattle - WOAH Terrestrial Animal Health Code: https://www.woah.org/en/what-we-do/standards/codes-and-manuals/terrestrial-code-online-access/ - FAO Animal Production and Health: https://www.fao.org/animal-production/en/ - WOAH (World Organisation for Animal Health): https://www.woah.org/en/home/ > This article is educational and is not a substitute for veterinary diagnosis, treatment, public-health guidance, or regulatory reporting.