# Cattle Feed Bunk Management: Reducing Waste and Improving Intake ## Key Takeaways - **Optimal bunk management aims for a "clean bunk" within 30-60 minutes prior to the next feeding**, indicating efficient feed utilization without significant waste or underfeeding. Consistent daily observation and scoring (e.g., 0-4 scale) are critical for assessing intake and making precise adjustments. - **Feed waste is primarily driven by overfeeding, sorting of palatable ingredients, bunk design flaws, and weather impacts**, leading to nutritional imbalances and economic loss. Addressing these requires meticulous attention to delivery volume, ration consistency, bunk infrastructure, and environmental factors. - **Intake fluctuations are influenced by weather (cold increases, heat decreases), production stage, health status, and social dynamics**, necessitating adaptive feeding strategies. A sudden drop in intake is a critical early indicator of potential illness, making bunk reading a vital health monitoring tool. - **Bunk design, including height (20-24 inches for mature cattle), width (12-18 inches), and adequate space (24-30 inches/head in feedlots), directly impacts cattle comfort and intake efficiency.** Proper drainage and smooth surfaces are essential to prevent spoilage and injury. - **Consistent feeding schedules and delivery methods are paramount**, with twice-daily feeding potentially beneficial for high-grain rations to mitigate acidosis risk and improve feed freshness. Pushing feed back into reach can increase intake by 5-10%. - **Recordkeeping of feed delivered, refused feed, and bunk scores is essential for identifying trends, calculating feed efficiency, and making data-driven adjustments**, enabling proactive management and economic optimization. --- Feed is the largest single cost in most cattle operations, and the feed bunk is where that cost is either protected or lost. This guide covers the full system of [cattle feed bunk](/knowledge/animal-farming/beef-cattle/cattle-feed-bunk-design-space-and-height) management, from bunk design and feed delivery to reading bunks daily and adjusting rations. It is written for cow-calf producers, stocker operators, and feedlot managers who want to reduce feed waste, improve cattle feed intake, and make better use of their feed dollars. You will learn practical methods for bunk reading, step by step procedures for adjusting feed calls, common mistakes to avoid, and how to track your results over time. ## At a Glance - **Bunk reading is a daily skill.** Check bunks at the same time each day, ideally 30 to 60 minutes before the next feeding. - **The goal is a clean bunk.** Cattle should clean up their feed within 30 to 60 minutes before the next delivery. A bunk that is empty too early means underfeeding. Feed left over means overfeeding. - **Push up feed frequently.** Cattle eat from the front of the bunk. Pushing feed back into reach can increase intake by 5 to 10 percent. - **Bunk space matters.** Provide 24 to 30 inches of bunk space per head in feedlot settings, and adjust for group size and dominance. - **Feed at consistent times.** Cattle adapt to a schedule. Irregular feeding times reduce intake and increase sorting. - **Keep records daily.** Track feed delivered, feed refused, and bunk scores. Use this data to make precise adjustments. - **Watch for sick cattle.** A sudden drop in intake is often the first sign of illness. Bunk reading is an early detection tool. - **Do not chase every fluctuation.** Small day to day changes are normal. Make feed adjustments based on trends over 3 to 5 days. ## Understanding [Feed Bunk Management](/knowledge/animal-farming/beef-cattle/feedlot-feed-bunk-management-reading-adjusting-intake) [Cattle feed bunk](/knowledge/animal-farming/beef-cattle/cattle-feed-bunk-design-space-and-height) management is the daily practice of matching feed delivery to the appetite of the animals in your care. It is not a one time setup. It is a constant cycle of observation, adjustment, and recordkeeping. The core principle is simple: feed cattle enough to maximize intake and growth without leaving excessive feed in the bunk to spoil or be sorted. When done well, bunk management reduces feed waste, improves feed efficiency, and keeps cattle healthy. When done poorly, it costs money in wasted feed, reduced gains, and increased digestive upsets. For a 500 head feedlot, even a 3 percent reduction in feed waste can save thousands of dollars per year. The system works on a simple feedback loop. You deliver feed. You observe how much cattle eat. You adjust the next delivery based on what you see. Over time, you build a record that helps you predict intake patterns and respond quickly to problems. ### Why Feed Waste Happens Feed waste occurs for several reasons. Understanding these causes helps you target your management efforts. **Overfeeding.** The most common cause of waste is simply delivering more feed than cattle can eat. Feed left in the bunk gets contaminated with manure, dirt, and saliva. It loses nutritional value. Cattle may refuse to eat it, and you end up cleaning it out and throwing it away. **Sorting.** Cattle are selective eaters. Given a mixed ration, they will pick out the palatable ingredients like grain and leave behind the less palatable ones like hay or mineral supplements. This changes the nutritional balance of what they actually consume. Sorting is worse when feed is delivered in large amounts or when particles are uneven in size. **Bunk design problems.** Bunks that are too low, too high, or poorly positioned make it hard for cattle to eat comfortably. Feed gets knocked onto the ground. Sharp edges can injure cattle. Poor drainage around the bunk leads to wet, spoiled feed. **Weather effects.** Rain and snow can ruin feed left in the bunk. Heat causes feed to spoil faster. Cold weather increases cattle energy needs, which changes intake. Wind can blow fines out of the bunk. **Social competition.** [Dominant](/blog/careers/dominant-definition-biology) cattle push subordinate animals away from the bunk. This reduces intake for the less [dominant](/blog/careers/dominant-definition-biology) animals and can lead to uneven performance across the group. **Poor feed quality.** If the ration is inconsistent or unpalatable, cattle will eat less and waste more. Moldy feed, stale feed, or feed with strong odors will be refused. ### Why Intake Fluctuates Cattle intake is not constant. It changes with weather, stage of production, health status, and social dynamics. A good bunk manager understands these fluctuations and adjusts accordingly. **Weather.** Cattle eat more in cold weather to meet energy demands. They eat less during heat stress. A sudden storm can reduce intake for a day or two. Extreme cold can increase intake by 10 to 20 percent. **Stage of production.** Growing cattle increase intake as they gain weight. Finishing cattle may plateau or slightly decrease intake near the end of the feeding period. Cows in late lactation eat more than dry cows. **Health status.** Sick cattle often stop eating before other symptoms appear. A drop in intake can be the first sign of respiratory disease, acidosis, or other health problems. This is why bunk reading is a critical health monitoring tool. **Feed changes.** Any change in feed ingredients, particle size, or moisture content can affect intake. Cattle need time to adapt to new feeds. Abrupt changes can cause digestive upset and reduced intake. **Social factors.** Introducing new cattle to a group disrupts the social order and can reduce intake for several days. Crowding reduces intake because subordinate animals cannot access the bunk. ## Step by Step Guide to Bunk Management ### Step 1: Set Up Your Bunk Correctly Good bunk management starts with good bunk design. The best feeding practices in the world cannot overcome a poorly designed bunk. **Bunk height.** The bunk height should match the size of your cattle. For mature cattle, the top of the bunk should be about 20 to 24 inches above the ground where the cattle stand. For calves, lower it to 16 to 20 inches. If the bunk is too high, cattle cannot reach the feed comfortably. If it is too low, they will root feed out onto the ground. **Bunk width.** The bunk should be wide enough for cattle to eat comfortably. A width of 12 to 18 inches from front to back is typical. The bottom of the bunk should be slightly rounded to prevent feed from accumulating in corners. **Bunk space.** The amount of bunk space per animal depends on your system. In a feedlot with continuous access, provide 24 to 30 inches per head. In a limit fed system where all cattle eat at once, provide 30 to 36 inches per head. If bunk space is limited, consider feeding more frequently or using a slick bunk approach to ensure all cattle get a chance to eat. **Bunk surface.** The bunk should be smooth and free of sharp edges. Concrete is the most common material. It should be sealed to prevent moisture absorption and make cleaning easier. Avoid wood bunks, which absorb feed and moisture and are difficult to sanitize. **Drainage.** The area around the bunk should be well drained. Mud around the bunk makes it hard for cattle to stand and eat. It also contaminates feed that falls to the ground. Consider a concrete apron extending 6 to 10 feet in front of the bunk. **Orientation.** Face the bunk away from prevailing winds in cold climates to protect feed from blowing snow. In hot climates, consider shade over the bunk to keep feed cooler and encourage daytime eating. ### Step 2: Establish a Feeding Schedule Cattle thrive on routine. They learn when to expect feed and will be waiting at the bunk at feeding time. This anticipation actually stimulates digestive juices and improves intake. **Feed at the same time every day.** Consistency is more important than the specific time you choose. If you feed at 7:00 AM, feed at 7:00 AM every day. Cattle adjust their eating patterns to your schedule. **Consider feeding frequency.** Once a day feeding is common and works well for many operations. Twice a day feeding can increase intake in hot weather, reduce sorting, and keep feed fresher. For high grain rations, twice a day feeding helps reduce the risk of acidosis by spreading intake across the day. **Deliver feed in the same order.** If you have multiple pens, feed them in the same order each day. This ensures the same cattle are not always waiting the longest for feed. **Account for daylight.** Cattle prefer to eat during daylight hours. In summer, they eat more in the early morning and evening. In winter, they may eat more during the warmer midday hours. Adjust delivery times to match these patterns if possible. ### Step 3: Learn to Read Bunks Bunk reading is the heart of feed bunk management. It is the daily observation of how much feed remains in the bunk and what that tells you about cattle appetite and health. **Timing.** Read bunks at the same time each day, ideally 30 to 60 minutes before the next feeding. This gives you a consistent picture of how well cattle cleaned up the previous delivery. **What to look for.** Examine the entire length of the bunk. Look for areas where feed is completely gone versus areas where feed remains. Note the amount of feed left, the particle size of the leftovers, and whether the feed looks fresh or stale. **Bunk scoring system.** Many operations use a simple scoring system to track bunk status. A common system uses a 0 to 4 scale: - **0 = Empty bunk.** All feed is gone. Cattle are standing at the bunk looking for more. This indicates underfeeding. Increase the next delivery by 5 to 10 percent. - **1 = Slick bunk.** The bunk is essentially clean, with only a few scattered particles. This is the ideal target for most operations. Increase the next delivery slightly, about 2 to 3 percent. - **2 = Scattered particles.** Small amounts of feed are scattered along the bunk bottom. This indicates a good level of feeding. Hold the feed delivery steady. - **3 = Thin layer of feed.** A thin, even layer of feed covers the bunk bottom. This indicates slight overfeeding. Reduce the next delivery by 2 to 3 percent. - **4 = Heavy feed cover.** A thick layer of feed remains in the bunk. This indicates significant overfeeding. Reduce the next delivery by 5 to 10 percent and consider cleaning the bunk. **Read the whole bunk.** Do not just look at one section. Cattle may clean up one end of the bunk and leave feed in another. This can indicate social issues, bunk design problems, or feed sorting. **Look at the cattle, not just the bunk.** Observe cattle behavior at the bunk. Are they aggressively eating? Are they standing back? Are any cattle not coming to the bunk at all? These observations are as important as the feed remaining. **Check the feed itself.** Look at the leftover feed. Is it mostly fines? Mostly long hay? This tells you about sorting. If cattle are sorting out grain and leaving forage, you may need to adjust particle size or feed more frequently. ### Step 4: Make Feed Adjustments Based on your bunk reading, you adjust the amount of feed you deliver. The goal is to find the sweet spot where cattle clean up the bunk just before the next feeding. **Start with a baseline.** When starting a new group of cattle or a new ration, begin with an estimated intake based on body weight and stage of production. A typical starting point is 2 to 2.5 percent of body weight on a dry matter basis for growing cattle, and 1.8 to 2.2 percent for finishing cattle. **Adjust in small increments.** Make feed adjustments of 2 to 5 percent per day. Large swings in feed delivery can cause digestive upset and intake fluctuations. It is better to make small adjustments over several days than to make one large adjustment. **Follow the trend, not the day.** Do not adjust feed based on a single day's bunk reading. Look at the pattern over 3 to 5 days. If the bunk is consistently scoring 0 or 1, increase feed. If it is consistently scoring 3 or 4, decrease feed. **Respond to weather.** When a cold front is forecast, increase feed by 5 to 10 percent before the front arrives. Cattle will need more energy to stay warm. When heat stress is expected, consider feeding a larger portion of the daily ration in the cooler morning hours. **Use the slick bunk approach for some systems.** Some feedlots intentionally manage to a slick bunk, meaning the bunk is completely empty for a period before the next feeding. This ensures maximum intake and reduces waste. However, it requires careful management to avoid underfeeding. It is best used for cattle on high concentrate rations where acidosis risk is a concern. **Clean out stale feed.** If feed remains in the bunk for more than 24 hours, it should be removed and discarded. Stale feed will not be eaten and can harbor mold and bacteria. Weigh the refused feed before discarding it to track waste. ### Step 5: Manage Feed Delivery How you deliver feed is almost as important as how much you deliver. **Use a consistent ration.** Mix the ration the same way every day. Inconsistent mixing leads to sorting and variable intake. Calibrate your mixer regularly to ensure accurate ingredient weights. **Control particle size.** A consistent particle size reduces sorting. Aim for a mix where most particles are 1 to 2 inches long. Too many fines lead to dust and reduced intake. Too many long particles lead to sorting. **Add moisture strategically.** Adding water or molasses to the ration can reduce dust, improve palatability, and reduce sorting. The target moisture content for a total mixed ration is often 40 to 50 percent. However, be careful with wet feeds in hot weather, as they spoil faster. **Deliver feed evenly along the bunk.** Spread feed evenly along the entire length of the bunk. This reduces competition and ensures all cattle have access. Uneven distribution leads to some cattle overeating and others going hungry. **Push up feed during the day.** Cattle push feed forward as they eat, making it hard to reach. Pushing feed back into reach 2 to 4 times per day can increase intake by 5 to 10 percent. This is especially important for high forage rations where cattle need to eat large volumes. **Fill bunks at the right level.** Do not pile feed high in the bunk. A deep pile encourages sorting and makes it hard for cattle to eat. Spread feed in a thin, even layer. ### Step 6: Monitor Health Through the Bunk The feed bunk is one of your best health monitoring tools. Changes in eating behavior often precede visible signs of illness. **Watch for individual cattle that stop eating.** If you notice a specific animal not coming to the bunk, mark it for observation. A drop in feed intake is often the first sign of respiratory disease, digestive problems, or lameness. **Watch for changes in group intake.** A sudden drop in intake across the entire group can signal a feed problem, water problem, or disease outbreak. Investigate immediately. **Watch for sorting behavior.** Excessive sorting can indicate a ration problem. Cattle may be sorting out an ingredient they find unpalatable, or they may be trying to select a higher energy diet. **Watch for aggressive behavior.** Excessive fighting at the bunk can indicate insufficient bunk space or competition for feed. This can lead to injuries and uneven intake. **Know when to call the veterinarian.** If you see multiple cattle off feed, signs of respiratory disease, or evidence of digestive upset such as bloating or diarrhea, contact your veterinarian. Early intervention is critical for treating disease and preventing outbreaks. ## Common Mistakes in Feed Bunk Management Even experienced producers make mistakes. Being aware of the most common ones can help you avoid them. ### Overfeeding to Avoid Underfeeding Many producers err on the side of overfeeding because they worry about underfeeding their cattle. This is understandable, but it is costly. Feed left in the bunk is wasted feed. It spoils, gets contaminated, and reduces the nutritional value of the ration. Overfeeding also encourages sorting and can lead to acidosis if cattle overeat certain ingredients. The solution is to trust your bunk reading and make systematic adjustments. Start with a conservative estimate and work up to the target intake over a week. The slick bunk is your friend. A bunk that is clean at feeding time means you are hitting the target. ### Inconsistent Feeding Times Cattle are creatures of habit. When feeding times vary, cattle become stressed and intake suffers. They do not know when to expect feed, so they may not be ready to eat when feed arrives. This reduces intake and can lead to digestive upset. Set a feeding schedule and stick to it. If you must change feeding times, do it gradually over several days. ### Ignoring Bunk Reading Some producers feed the same amount every day without looking at the bunk. This ignores the most valuable information you have about your cattle. Bunk reading takes only a few minutes per day and provides critical data on intake, health, and feed quality. Make bunk reading a non-negotiable part of your daily routine. It should be as automatic as checking water and checking fences. ### Making Large Feed Adjustments When a bunk is empty, the temptation is to add a large amount of feed to make up for it. This is a mistake. Large feed increases can cause digestive upset, especially on high grain rations. Cattle cannot adapt quickly to large changes in feed intake. Make adjustments in small increments of 2 to 5 percent per day. It is better to take a few days to reach the target intake than to risk acidosis. ### Not Accounting for Weather Weather has a major effect on cattle intake. Cold weather increases energy needs and intake. Heat stress reduces intake. Rain and snow affect feed quality and availability. Check the weather forecast and adjust feed delivery accordingly. Increase feed before cold fronts. Reduce feed during heat waves. Protect bunks from rain and snow. ### Poor Bunk Maintenance Bunks that are not cleaned and maintained become a source of spoilage and disease. Feed accumulates in corners and cracks, where it molds and harbors bacteria. Sharp edges injure cattle. Clean bunks regularly and repair damage promptly. A few minutes of maintenance per week saves feed and prevents health problems. ### Not Tracking Data Bunk management is a data driven process. If you do not keep records of feed delivered, feed refused, and bunk scores, you are flying blind. You cannot identify trends or make informed adjustments. Keep a simple daily log. Record the date, pen number, feed delivered, bunk score, and any observations. Review the log weekly to identify patterns. ## Decision Thresholds for Feed Adjustments Knowing when to adjust feed is as important as knowing how to adjust it. The following thresholds provide practical guidance for common situations. ### When to Increase Feed - **Bunk score 0 or 1 for 2 to 3 consecutive days.** This indicates cattle are cleaning up all available feed and are ready for more. - **Bunk score 0 with cattle waiting at the bunk.** If cattle are standing at the bunk looking for feed before delivery, they are underfed. - **Cold weather forecast.** Increase feed by 5 to 10 percent before a cold front arrives. - **Expected weight gain is below target.** If cattle are not gaining as expected, they may not be getting enough feed. ### When to Decrease Feed - **Bunk score 3 or 4 for 2 to 3 consecutive days.** This indicates cattle are not cleaning up the feed and you are overfeeding. - **Heat stress.** Reduce feed during periods of extreme heat, and consider feeding a larger portion in the cooler morning hours. - **Signs of acidosis.** If cattle show signs of digestive upset, reduce feed immediately and contact your veterinarian. - **Feed is spoiling in the bunk.** If feed is going stale before it is eaten, you are delivering too much. ### When to Hold Feed Steady - **Bunk score 2.** This is the target. Cattle are cleaning up the feed without being underfed. - **Cattle are healthy and gaining well.** If performance is on track, do not change what is working. - **During adaptation periods.** When changing rations or introducing new cattle, hold feed steady to allow cattle to adapt. ### When to Call for Help - **Multiple cattle off feed.** If several animals in a pen are not eating, this is a health emergency. Contact your veterinarian. - **Signs of respiratory disease.** Coughing, nasal discharge, and labored breathing in combination with reduced intake require veterinary attention. - **Signs of acidosis.** Bloating, diarrhea, and lethargy in cattle on high grain rations are emergencies. - **Sudden drop in group intake.** If intake drops by more than 20 percent overnight, investigate immediately and contact your veterinarian or extension agent. ## Monitoring and Recordkeeping Good recordkeeping is essential for effective bunk management. The data you collect today helps you make better decisions tomorrow and next month. ### What to Record **Daily feed records.** Record the amount of feed delivered to each pen, the time of delivery, and the bunk score at the next feeding. This is your primary data set. **Feed refusal records.** When you clean out bunks, weigh the refused feed and record it. This tells you exactly how much feed was wasted. **Weather records.** Note significant weather events, including temperature extremes, precipitation, and wind. This helps you understand intake fluctuations. **Health records.** Note any cattle pulled from pens for treatment, any signs of illness, and any deaths. Correlate health events with feed intake data. **Ration changes.** Record any changes to the ration, including ingredient changes, moisture adjustments, and particle size changes. ### How to Use the Data **Track intake trends.** Calculate average daily intake per pen on a weekly basis. Look for trends over time. A gradual increase is normal for growing cattle. A sudden drop requires investigation. **Calculate feed efficiency.** Divide total weight gain by total feed intake to calculate feed conversion. This tells you how efficiently cattle are converting feed to gain. Track this over time to identify problems. **Identify problem pens.** Some pens will consistently have higher waste or lower intake than others. Investigate why. It may be a bunk design issue, a social issue, or a health issue. **Plan for future groups.** Historical intake data helps you predict intake for future groups of similar cattle. This allows you to start with a more accurate feed estimate. ### Simple Recordkeeping Systems You do not need expensive software to track bunk management data. A simple notebook or spreadsheet works well for most operations. **Daily log.** Keep a daily log for each pen with columns for date, feed delivered, bunk score, and notes. This is your primary record. **Weekly summary.** Each week, summarize the data by pen. Calculate average daily intake, total feed delivered, and total feed refused. **Monthly review.** Each month, review the weekly summaries to identify trends and problems. Use this review to plan adjustments for the coming month. ## Advanced Bunk Management Strategies Once you have mastered the basics, consider these advanced strategies to further improve your bunk management. ### Clean Bunk Management Clean bunk management is a specific approach where the bunk is managed to be completely empty at a set time each day. This ensures maximum intake and minimizes waste. It is commonly used in feedlots with high grain rations. The key is to determine the target time for the bunk to be clean. This is typically 30 to 60 minutes before the next feeding. You adjust feed delivery daily to hit this target. If the bunk is clean too early, increase feed. If feed remains, decrease feed. This approach requires daily adjustment and careful observation. However, it maximizes intake and reduces waste, which can improve feed efficiency by 3 to 5 percent. ### Limit Feeding Limit feeding involves restricting feed intake to a set amount rather than allowing free choice access. This is common in replacement heifer development and some cow calf operations. When limit feeding, the bunk is managed to be completely empty at each feeding. Cattle are fed a set amount based on target weight gain. This approach reduces feed waste and improves feed efficiency, but requires careful bunk management to ensure all cattle get their share. Bunk space becomes more critical with limit feeding. Provide 30 to 36 inches per head to ensure all cattle can eat at the same time. ### Step Up Rations When transitioning cattle to a high concentrate ration, use a step up program. This gradually increases the grain content of the ration over 2 to 3 weeks to allow cattle to adapt. During the step up period, bunk management is critical. Intake will vary as cattle adapt to the new ration. Watch for signs of acidosis and adjust feed delivery accordingly. If intake drops, hold feed steady until cattle adapt. A typical step up program might start with 40 percent concentrate and increase by 10 to 15 percent every 3 to 4 days until reaching the final ration. Each step requires careful bunk management to avoid overeating. ### Bunk Management for Different Cattle Types Different classes of cattle have different intake patterns and management needs. **Cow calf operations.** Bunk management for cows is often simpler than for feedlot cattle. Cows on pasture may only need supplemental feed during periods of low forage quality or high energy demand. When feeding cows, focus on consistent delivery and preventing waste. **Stocker operations.** Stocker cattle are growing animals on forage based diets. They may receive supplemental feed to improve gains. Bunk management for stockers focuses on ensuring adequate intake without overfeeding grain. **Feedlot operations.** Feedlot cattle are on high concentrate rations where acidosis risk is high. Bunk management is critical to prevent digestive upset and maximize feed efficiency. The clean bunk approach is common. **Show cattle.** Show cattle are often fed individually. Bunk management focuses on precise intake control to achieve target weight and condition. Keep detailed records of feed intake and adjust based on body condition. ## Troubleshooting Common Bunk Problems Even with good management, problems arise. Here are common issues and how to address them. ### Cattle Are Sorting Feed If cattle are sorting out certain ingredients and leaving others, the problem is usually particle size or palatability. Check the ration for consistency. Are the particles uniform in size? Are there unpalatable ingredients? Solutions include mixing the ration longer, adding moisture to reduce dust, and using a total mixed ration rather than feeding ingredients separately. You may also need to feed more frequently to reduce the amount of feed available for sorting. ### Intake Drops Suddenly A sudden drop in intake is a red flag. Check for these causes: - **Feed problem.** Is the feed moldy, stale, or spoiled? Did the ration change recently? - **Water problem.** Are cattle getting enough clean water? Water is the most important nutrient and intake drops quickly when water is limited. - **Health problem.** Are cattle showing signs of illness? Check for respiratory disease, digestive upset, and lameness. - **Social problem.** Were new cattle added to the group? Is there excessive competition at the bunk? Investigate immediately. A sudden drop in intake often signals a serious problem that requires intervention. ### Feed Spoils in the Bunk If feed spoils before cattle eat it, you are likely overfeeding or the bunk environment is poor. Reduce feed delivery and clean the bunk more frequently. Check for drainage problems around the bunk. In hot weather, consider feeding more frequently to keep feed fresh. ### Some Cattle Are Not Eating If certain cattle are not coming to the bunk, they may be sick, injured, or socially subordinate. Watch the pen to identify which cattle are not eating. Check them for signs of illness or injury. If social competition is the issue, consider adding bunk space or splitting the group. ### Cattle Are Aggressive at the Bunk Excessive aggression at the bunk indicates competition for feed. This can be caused by insufficient bunk space, uneven feed distribution, or feed delivery that is too limited. Provide more bunk space, distribute feed evenly, and consider feeding more frequently. ## When to Call a Veterinarian or Extension Agent Bunk management is a tool for early detection of problems. Some situations require professional help. ### Call Your Veterinarian When - **Multiple cattle are off feed.** If several animals in a pen are not eating, this is a health emergency. - **You see signs of respiratory disease.** Coughing, nasal discharge, labored breathing, and fever in combination with reduced intake require veterinary attention. - **You see signs of acidosis.** Bloating, diarrhea, lethargy, and neurological signs in cattle on high grain rations are emergencies. - **You see signs of other diseases.** Any unusual symptoms or behavior changes warrant a veterinary consultation. - **Death loss increases.** Any unexplained death loss requires investigation. ### Call Your Extension Agent When - **You need help formulating rations.** Extension agents can help you design cost effective rations that meet cattle nutritional needs. - **You are considering a major management change.** Whether you are transitioning to a new feeding system or adding a new class of cattle, extension agents can provide guidance. - **You need help interpreting data.** If you are collecting bunk management data but are unsure how to use it, an extension agent can help you analyze it. - **You want to learn more about bunk management.** Many extension services offer workshops and publications on feed bunk management. ## Frequently Asked Questions ### How much bunk space do cattle need? The amount of bunk space depends on your system and cattle type. For feedlot cattle with continuous access to feed, provide 24 to 30 inches per head. For limit fed cattle that all eat at once, provide 30 to 36 inches per head. For cows on pasture receiving supplemental feed, provide 24 to 30 inches per head if they are fed as a group. If bunk space is limited, you may need to feed more frequently to ensure all cattle get access. ### What is the ideal bunk score? For most operations, a bunk score of 1 or 2 is ideal. This means the bunk is essentially clean or has only scattered particles of feed at the next feeding time. This indicates cattle are eating all the feed you deliver without being underfed. A score of 0 indicates underfeeding. A score of 3 or 4 indicates overfeeding. ### How often should I read bunks? Read bunks at least once per day, at the same time each day. The best time is 30 to 60 minutes before the next feeding. This gives you a consistent picture of how well cattle cleaned up the previous delivery. In hot weather or with high risk cattle, consider reading bunks twice per day to catch problems early. ### How much feed should I increase when the bunk is clean? When the bunk is clean, increase feed by 2 to 5 percent per day. Do not make large increases, as this can cause digestive upset. If the bunk is consistently clean for several days, continue increasing gradually until you reach the target intake. If the bunk is clean but cattle are not waiting at the bunk, hold feed steady for a few days. ### What should I do with leftover feed in the bunk? Feed that remains in the bunk for more than 24 hours should be removed and discarded. It has lost nutritional value and may be contaminated with manure, saliva, and mold. Weigh the refused feed before discarding it to track waste. If you are consistently removing large amounts of leftover feed, you are overfeeding and should reduce delivery. ### How does weather affect bunk management? Weather has a major effect on cattle intake. Cold weather increases energy needs, so cattle eat more. Increase feed by 5 to 10 percent before a cold front arrives. Heat stress reduces intake, so reduce feed during hot weather and feed a larger portion in the cooler morning hours. Rain and snow can spoil feed in the bunk, so protect bunks from precipitation and clean out wet feed promptly. ### How can I reduce feed sorting? Feed sorting is reduced by controlling particle size, adding moisture, and feeding a total mixed ration. Aim for a consistent particle size of 1 to 2 inches. Adding water or molasses to reduce dust helps prevent sorting. Feeding a total mixed ration rather than feeding ingredients separately reduces the ability of cattle to select certain ingredients. Feeding more frequently also reduces sorting by limiting the amount of feed available at any one time. ### What are the first signs of acidosis at the bunk? The first sign of acidosis is often a sudden drop in feed intake. Cattle may also show signs of reduced rumination, diarrhea, and lethargy. In severe cases, cattle may be bloated, unsteady, or down. If you suspect acidosis, reduce feed immediately and contact your veterinarian. Acidosis is a medical emergency that requires prompt treatment. ## Related Farming Guides This section will be populated with links to related farming guides on cattle nutrition, feedlot management, herd health, and other relevant topics. Check back for updates or browse the site for more resources on [beef cattle production](/knowledge/animal-farming/beef-cattle/beef-cattle-production-systems-economics-and-sustainability). ## 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.