# Feedlot Feed Bunk Design and Management ## Key Takeaways - Provide 24 to 30 inches of linear bunk space per mature animal, adjusting to 18-24 inches for cattle under 800 lbs and up to 36 inches for bulls or during heat stress to ensure adequate access and minimize competition. - Set bunk feed surface height at 18-24 inches from the ground for mature cattle, with lower heights for calves and higher for bulls, ensuring the animal's mouth aligns with the feed to minimize spillage and strain. - Utilize concrete construction with a smooth, dense finish and a 10-15% slope towards the cattle to facilitate feed access and water drainage, while avoiding wood and steel due to moisture absorption, corrosion, and bacterial harborage. - Implement a daily management routine of observing bunk scores (0-4 scale) before feeding, adjusting delivery amounts based on remaining feed to achieve a near-empty bunk, and cleaning bunks daily or every other day to remove spoiled feed. - Maintain detailed daily records of feed delivered, refused feed, bunk scores, cattle numbers, and weather conditions, reviewing them weekly to adjust intake estimates and identify potential health or ration issues. - Promptly address bunk maintenance issues such as cracks, sharp edges, or erosion, and consult a veterinarian if cattle exhibit prolonged anorexia (>24 hours), bloat, or neurological signs, indicating potential acute health crises. --- Feed bunk design and management determine how much feed your cattle consume, how much waste you haul out of the pen, and how much labor you spend every day. This guide covers the full system: bunk dimensions, spacing, placement, feed delivery schedules, maintenance routines, and the records you need to keep. It is written for feedlot owners, managers, and herd workers who want practical answers they can apply to their own facilities. ## At a Glance - Provide 24 to 30 inches of linear bunk space per cow for most feedlot pens. Adjust to 18 to 24 inches for cattle under 800 pounds and 30 to 36 inches for mature bulls or during heat stress. - Set bunk height at 18 to 24 inches from the ground to the top of the feed surface for mature cattle. Lower bunks for calves, higher for bulls. - Slope the bunk floor toward the cattle at a 10 to 15 percent grade so feed stays within reach and water drains away. - Use concrete bunk construction with a smooth, dense finish. Avoid wood and steel for permanent bunks because they absorb moisture, corrode, and harbor bacteria. - Allow 12 to 18 inches of bunk clearance behind the feed line for tractor access and cleaning. - Feed at the same time every day. Cattle adapt to a routine, and consistent delivery reduces sorting and digestive upset. - Clean bunks daily or at least every other day. Remove wet, spoiled, or moldy feed before it contaminates fresh feed. - Keep records of feed delivered, feed refused, bunk scores, cattle numbers, and weather conditions. Review these records weekly to adjust intake estimates. - Inspect bunks weekly for cracks, sharp edges, loose bolts, and erosion at the base. Repair damage immediately to prevent injury and feed waste. - Call a veterinarian if cattle go off feed for more than 24 hours, show signs of bloat, or display neurological symptoms like staggering or head pressing. ## Understanding Feed Bunk Design Fundamentals Feed bunks are the interface between your feeding program and your cattle. A well-designed bunk allows every animal to access feed comfortably, reduces competition, and keeps feed clean and dry. A poorly designed bunk creates waste, injury, and inconsistent intake. The design process starts with three questions. How many cattle will eat from this bunk? What size are those cattle? How will you deliver feed? Answer these questions before you pour concrete or weld steel. ### Why Bunk Design Matters Cattle are herd animals with a social hierarchy. [Dominant](/blog/careers/dominant-definition-biology) animals eat first and push others aside. If bunk space is too tight, subordinate cattle cannot reach feed and lose condition. If bunk space is excessive, feed sits exposed too long and spoils. The correct bunk space balances access with freshness. Bunk design also affects feed waste. A bunk that is too high forces cattle to reach upward, dropping feed onto the ground. A bunk that is too low forces cattle to strain downward, which also causes waste. The feed surface must sit at the right height relative to the animal's mouth. [Feed bunk management](/knowledge/animal-farming/beef-cattle/feedlot-feed-bunk-management-reading-adjusting-intake) is the daily routine that keeps the system working. It includes when you deliver feed, how much you deliver, how you clean the bunk, and how you respond to changes in intake. Even the best-designed bunk fails without consistent management. ### Key Design Terms Understanding these terms helps you evaluate your current setup and communicate with builders. | Term | Definition | |---|---| | Bunk space | The linear feet of feed surface available per animal | | Bunk height | Distance from the ground to the top of the feed surface | | Bunk clearance | Space behind the bunk for tractor and equipment access | | Feed apron | The flat surface where feed sits, usually the bottom of the bunk | | Curb | The vertical or angled wall at the back of the feed apron that holds feed in the bunk | | Throat height | Distance from the ground to the top of the curb on the cattle side | | Slope | The angle of the feed apron, typically 10 to 15 percent toward the cattle | ## Bunk Space per Cow: Getting the Numbers Right Bunk space per cow is the most common question in [feedlot design](/knowledge/animal-farming/farm-management/beef-cattle-feedlot-design-pen-layout-manure). The answer depends on cattle size, feeding frequency, weather, and your management style. ### Standard Space Recommendations For most feedlot conditions, provide 24 to 30 inches of linear bunk space per animal. This range works for cattle from 600 to 1,400 pounds under normal conditions. Use these adjustments based on animal size and situation: - Calves under 600 pounds: 18 to 24 inches - Yearlings 600 to 900 pounds: 24 to 30 inches - Heavy cattle over 900 pounds: 30 inches - Bulls or aggressive cattle: 30 to 36 inches - Heat stress conditions: 30 to 36 inches - Cows with calves: 36 inches These numbers assume cattle have access to the bunk most of the day. If you restrict feeding to specific times, increase bunk space by 20 to 30 percent to reduce competition. ### Calculating Total Bunk Length To calculate total bunk length for a pen, multiply the number of cattle by the per-head space. Example: A pen holds 100 yearlings averaging 750 pounds. At 24 inches per head, you need 2,400 inches of bunk, which is 200 feet. At 30 inches per head, you need 250 feet. Round up to the nearest available bunk section. It is easier to block off unused bunk than to add length later. ### When to Increase Bunk Space Increase bunk space in these situations: - During hot weather when cattle eat more at dawn and dusk. Extra space lets more animals eat at the same time when temperatures are cooler. - When introducing new cattle to the feedlot. New arrivals need easier access while they learn the feeding routine. - When feeding high-energy rations. Competition for high-value feed increases aggression. - When cattle are on restricted intake programs. Limited feed makes every mouthful more valuable. ### When You Can Reduce Bunk Space You can reduce bunk space in these situations: - When feeding free-choice roughage that cattle do not value highly. - When cattle are calm and have an established social order. - When you deliver feed multiple times per day so cattle do not need to eat all at once. - When pens have fewer than 20 head and social competition is minimal. ## Bunk Height and Dimensions Bunk height determines how easily cattle can reach feed. The correct height reduces waste and strain on the animal's neck and shoulders. ### Measuring Bunk Height Bunk height is measured from the ground where the animal stands to the top of the feed surface. This is the critical dimension. The curb height on the cattle side matters less than the height of the feed surface itself. For mature cattle weighing 1,000 to 1,400 pounds, set the feed surface at 18 to 24 inches above the standing surface. For calves under 600 pounds, use 14 to 18 inches. For bulls, use 24 to 30 inches. The key is that the animal's mouth should be at the same level as the feed surface when the animal stands naturally. Cattle should not have to reach up or stretch down significantly. ### Bunk Depth and Width The feed apron should be 24 to 36 inches wide from the back curb to the front edge. This width holds enough feed for a single delivery without excessive spillage. The back curb should rise 6 to 12 inches above the feed apron to keep feed contained. A higher curb holds more feed but makes cleaning harder. A lower curb is easier to clean but increases spillage. The front edge of the bunk, on the cattle side, should be smooth and rounded. Sharp edges cut lips and tongues, leading to injuries and reduced intake. ### Slope of the Feed Apron The feed apron should slope toward the cattle at a 10 to 15 percent grade. This slope serves two purposes. First, it keeps feed within easy reach of the animal's mouth. Second, it allows water to drain away from the feed, keeping the ration dry. A slope that is too steep causes feed to slide forward and spill. A slope that is too flat holds water and lets feed sit in moisture, which promotes mold growth. ### Concrete Specifications Use concrete with a minimum compressive strength of 3,500 psi for feed bunks. The surface should be smooth enough to clean easily but textured enough to prevent cattle from slipping. Add a hardener to the concrete surface to reduce wear from tractor scrapers and cattle hooves. A troweled finish that is dense and nonporous resists acid damage from silage and wet feed. Expansion joints should be placed every 10 to 15 feet to prevent cracking. Seal these joints with a flexible material that does not trap feed debris. ## Bunk Placement and Pen Layout Where you place bunks in the pen affects drainage, shade, wind patterns, and cattle behavior. Poor placement creates mud, heat stress, and feeding problems. ### Fence-Line Bunks Fence-line bunks sit on the pen boundary, with cattle eating from one side and feed delivery from the other. This is the most common arrangement in commercial feedlots. Fence-line bunks allow one feed alley to serve two pens, reducing construction cost and delivery time. The feed alley should be at least 12 feet wide for tractor access, or 14 to 16 feet if you use a truck-mounted mixer. The cattle side of the bunk should have a concrete apron extending 6 to 10 feet into the pen. This apron keeps the area dry and prevents mud from building up around the bunk. It also gives cattle solid footing while they eat. ### Center-of-Pen Bunks Center-of-pen bunks sit in the middle of the pen with cattle eating from both sides. This arrangement doubles the feed surface per linear foot but requires more concrete and makes cleaning harder. Center-of-pen bunks work well for small pens with fewer than 50 head. They also suit cow-calf operations where cows and calves eat together. The main drawback is that you must drive through the pen to deliver feed, which disturbs cattle and creates mud around the bunk. ### Orientation and Drainage Orient bunks so the feed alley stays dry and the pen drains away from the feed area. The bunk should sit on the high side of the pen, with the pen sloping away at a 2 to 4 percent grade. Avoid placing bunks in low spots where water collects. Standing water around the bunk keeps feed wet and creates mud that increases the risk of foot rot and other infections. ### Shade and Wind Considerations In hot climates, place bunks where cattle can access shade during the hottest part of the day. Cattle eat more when they are comfortable, and a shaded bunk area encourages daytime intake. In cold climates, place bunks where they are protected from prevailing winter winds. Wind chill reduces intake and increases energy requirements. A windbreak along the north and west sides of the feed alley helps keep cattle comfortable. ## Feed Bunk Construction Options You can build feed bunks from several materials. Each option has trade-offs in cost, durability, and maintenance. ### Concrete Bunks Concrete is the standard material for permanent feed bunks. It lasts 20 to 30 years with proper construction and maintenance. Concrete resists moisture, acid, and abrasion better than any other common material. Cost runs $15 to $30 per linear foot for a poured-in-place bunk, depending on local labor and material prices. Precast concrete bunks cost more upfront but install faster and often have better finish quality. The main disadvantage of concrete is that it cracks over time. Small cracks trap feed and moisture, which promotes bacterial growth. Regular inspection and sealing prevent small cracks from becoming large problems. ### Steel Bunks Steel bunks are less common for permanent installations but work well for portable or temporary feeding setups. They are lighter than concrete and easier to move between pens. Steel corrodes when exposed to wet feed, silage acids, and urine. Galvanized steel resists corrosion but costs more. Paint-on coatings wear off quickly in feedlot conditions and require frequent reapplication. Use steel bunks only for dry feed or in climates with low rainfall. In wet conditions, steel bunks fail within 5 to 10 years. ### Wood Bunks Wood bunks are the cheapest option but the least durable. Treated lumber resists rot but still absorbs moisture and harbors bacteria. Untreated wood fails within 2 to 3 years in feedlot conditions. Wood bunks also splinter, creating sharp edges that injure cattle tongues and lips. Replace damaged boards immediately. Use wood bunks only for temporary feeding or for calves that will move to permanent facilities within a few months. ### Portable Bunks Portable bunks suit operations that rotate cattle between pastures or use temporary feeding areas. They are typically made of steel or heavy plastic and can be moved with a tractor or skid steer. Portable bunks cost less than permanent concrete but require more daily management. You must move them before mud builds up around the base, and you must store them when not in use. ## Feed Bunk Management Daily Routine Good bunk management is a daily discipline. The routine has three phases: observation, feeding, and cleaning. Each phase supports the others. ### Phase 1: Observation Before Feeding Walk the feed alley before you deliver feed. Look at each bunk and assess what is left from the previous feeding. This observation tells you whether cattle are eating as expected. Use a bunk scoring system to track intake. The standard system uses a scale from 0 to 4: | Score | Condition | Meaning | |---|---|---| | 0 | Bunk empty, feed surface clean | Cattle are cleaning up all feed, may need more | | 1 | Scattered particles, less than 5 percent of feed remains | Intake is on target | | 2 | Thin uniform layer of feed covering the bunk floor | Cattle are slightly behind on intake | | 3 | Thick layer of feed, 25 to 50 percent remains | Cattle are off feed or ration is unpalatable | | 4 | Bunk full, feed untouched | Serious problem, do not add more feed | Record the bunk score for each pen before feeding. Over time, these scores reveal patterns in intake that help you adjust delivery amounts. ### Phase 2: Feed Delivery Deliver feed at the same time every day. Cattle learn the schedule and gather at the bunk before feeding. Consistent timing reduces stress and helps maintain steady intake. The amount you deliver depends on the bunk score from the previous feeding. If cattle cleaned the bunk completely, increase the delivery by 2 to 5 percent. If feed remains, hold the delivery steady or reduce it slightly. The goal is to have the bunk nearly empty at the next feeding time. A completely empty bunk means cattle may have gone hungry. A bunk with 10 to 20 percent feed remaining means you are overfeeding. ### Phase 3: Cleaning and Maintenance Remove uneaten feed from bunks before each delivery. Wet, spoiled feed contaminates fresh feed and reduces intake. Moldy feed can cause digestive upset and respiratory problems. Use a scraper or shovel to remove all feed debris from the bunk floor. Pay attention to corners and joints where feed accumulates. Rinse the bunk with water if it is heavily contaminated. How often you clean depends on the ration and weather. Dry rations in cool weather may only need cleaning every other day. Wet rations or hot, humid conditions require daily cleaning. ## Adjusting Feed Delivery Based on Bunk Management Bunk management is the primary tool for matching feed delivery to cattle intake. The process is simple: observe what cattle leave, adjust what you deliver, and track the pattern. ### When to Increase Feed Delivery Increase feed delivery when bunks are clean at the next feeding and cattle are standing at the bunk waiting for feed. This behavior indicates that cattle are hungry and ready to eat more. Increase delivery gradually, by 2 to 5 percent per day, until cattle leave a thin layer of feed in the bunk. This thin layer, about 5 to 10 percent of the delivered amount, indicates that cattle are eating to appetite. ### When to Decrease Feed Delivery Decrease feed delivery when more than 10 percent of the previous delivery remains at the next feeding. Leftover feed means you overestimated intake. Cut delivery back to the amount cattle actually consumed. For example, if you delivered 20 pounds per head and 3 pounds remain, reduce the next delivery to 17 or 18 pounds per head. Do not reduce delivery drastically. A sudden drop in feed can cause digestive upset, especially in cattle on high-concentrate rations. ### Responding to Weather Changes Weather has a major effect on feed intake. Cattle eat more when temperatures are cool and less when temperatures are extreme. During cold snaps, increase feed delivery by 5 to 10 percent to help cattle maintain body temperature. During heat waves, reduce delivery by 5 to 10 percent and feed more during cooler morning hours. Rain changes intake patterns too. Cattle often eat less during heavy rain and then eat more once the weather clears. Adjust delivery based on bunk scores rather than a fixed schedule. ## Common Feed Bunk Mistakes Avoid these common errors to keep your feeding program on track. ### Overfeeding The most expensive mistake is delivering more feed than cattle can eat. Excess feed spoils in the bunk, and spoiled feed is wasted money. Overfeeding also masks health problems because cattle that are going off feed may still have access to fresh feed. Monitor bunk scores daily and adjust delivery to match intake. It is better to have bunks slightly empty than slightly full. ### Underfeeding Underfeeding limits weight gain and increases aggression at the bunk. Cattle that are hungry push and fight, which causes injuries and stress. Chronic underfeeding also weakens the immune system and increases disease risk. If bunks are consistently clean at feeding time, increase delivery until cattle leave a thin layer of feed. ### Inconsistent Feeding Times Cattle thrive on routine. Feeding at different times each day causes stress and reduces intake. Set a feeding schedule and stick to it, even on weekends and holidays. If you must change feeding times, do it gradually over several days. Sudden changes in feeding time can cause digestive upset. ### Ignoring Bunk Scores Bunk scores are your best tool for monitoring cattle health. A pen that suddenly leaves feed when it has been cleaning up is showing an early sign of illness. Cattle that are sick or stressed stop eating before they show other clinical signs. Track bunk scores and investigate any sudden change. A drop in intake across multiple pens may indicate a feed quality problem. A drop in one pen may indicate a health problem in that group. ### Poor Bunk Cleaning Feed that sits in the bunk for days becomes a breeding ground for bacteria and mold. Cattle that eat spoiled feed are at risk for digestive upset, respiratory disease, and other infections. Clean bunks thoroughly and regularly. Remove all old feed before adding new feed. In wet weather, clean bunks more frequently to prevent feed from becoming saturated. ## Feed Bunk Maintenance and Repair Regular maintenance extends the life of your bunks and prevents injuries to cattle and workers. ### Daily Maintenance Inspect bunks visually during each feeding. Look for: - Cracks in concrete that catch feed or hold water - Sharp edges that could cut cattle - Loose bolts or brackets on steel bunks - Rotting boards on wooden bunks - Erosion at the base where cattle stand Fix small problems immediately. A small crack that is sealed takes minutes to repair. The same crack left untreated becomes a large repair in a few months. ### Weekly Maintenance Once a week, do a more thorough inspection. Walk the entire feed alley and examine each bunk section. Check the slope of the feed apron. If the apron has settled or eroded, the slope may have changed, making feed harder to reach. Check the expansion joints for debris and reseal them if needed. Check the concrete surface for spalling, which is flaking or chipping of the surface. Spalling creates rough areas that are hard to clean and can injure cattle. ### Seasonal Maintenance At the start of each feeding season, do a full inspection and repair program. This program should include: - Patching cracks with concrete repair material - Resealing expansion joints - Replacing damaged boards or panels - Tightening bolts and brackets - Repainting steel surfaces with corrosion-resistant paint - Checking drainage around the bunk base ### Repair Techniques Small cracks in concrete can be sealed with a polyurethane or epoxy sealant. Clean the crack thoroughly, remove loose material, and apply the sealant according to the manufacturer's instructions. Larger cracks and spalled areas require patching with concrete repair mortar. Remove all loose material, clean the area, and apply the mortar in thin layers. Allow each layer to cure before applying the next. Erosion at the base of the bunk, where cattle stand, is common in wet conditions. Repair this area by adding a new concrete apron or grading the pen to improve drainage. ## Monitoring and Recordkeeping Good records help you make better feeding decisions and identify problems early. The records do not need to be complex. Simple, consistent tracking is more valuable than elaborate systems you abandon after a few weeks. ### Daily Records Keep these records for each pen every day: - Date and time of feeding - Feed delivered in pounds per head - Bunk score before feeding - Feed refused in pounds per head - Weather conditions and temperature - Number of cattle in the pen - Any cattle pulled for treatment ### Weekly Records Once a week, calculate these summary numbers: - Average daily feed intake per head - Feed conversion, if you have weight data - Percentage of feed refused - Number of cattle treated for illness ### Using Records to Improve Management Review your records weekly to spot trends. A gradual increase in intake indicates cattle are growing and gaining weight. A sudden drop in intake may indicate a feed quality problem or an illness outbreak. Compare intake across pens. If one pen is eating significantly less than similar pens, investigate the difference. The problem may be bunk design, water availability, or animal health. Share records with your veterinarian and nutritionist. These professionals can use your records to adjust rations and identify health problems early. ## When to Call a Veterinarian or Extension Agent Bunk management helps you identify health problems, but it does not replace professional care. Know when to call for help. ### Call a Veterinarian Immediately If - Cattle in a pen go off feed suddenly, with multiple animals refusing to eat - Cattle show signs of bloat, including a distended left side and difficulty breathing - Cattle stagger, circle, or press their heads against fences - Multiple cattle show signs of respiratory distress, including coughing, nasal discharge, and rapid breathing - Cattle have diarrhea that is watery, bloody, or foul-smelling - Cattle are down and unable to rise These signs indicate a potential emergency. Call your veterinarian immediately and describe the situation. ### Call a Veterinarian Within 24 Hours If - One or two cattle in a pen go off feed for more than 24 hours - Cattle have reduced intake over several days without an obvious cause - Cattle show signs of lameness or foot problems - Cattle have swelling in the jaw, throat, or brisket - Cattle have persistent coughing or nasal discharge ### Call an Extension Agent When - You are designing new bunks or renovating existing facilities - You want to change your feeding program or ration formulation - You need help interpreting your feeding records - You want to learn about new bunk management technologies - You are considering a major change to your feedlot operation Extension agents provide free or low-cost advice on facility design, feeding programs, and management practices. They can also connect you with other resources, including feed analysis labs and equipment manufacturers. ## Special Considerations for Different Cattle Classes Bunk design and management vary by cattle class. Adjust your approach based on the animals you are feeding. ### Calves and Growing Cattle Calves need lower bunks and more bunk space per head than mature cattle. Their smaller size makes it harder to reach feed in a standard bunk. Set the feed surface at 14 to 18 inches for calves under 600 pounds. Calves also need more bunk space because they are less efficient at competing for feed. Provide 18 to 24 inches per head and consider feeding more frequently to reduce competition. ### Finishing Cattle Finishing cattle on high-concentrate rations need careful bunk management to prevent digestive upset. The transition to high-energy rations must be gradual, and intake must be monitored closely. Use bunk scores to guide the transition. Increase concentrate levels only when cattle are cleaning up their feed consistently. A sudden drop in intake during the finishing phase can trigger acidosis and other metabolic problems. ### Bulls Bulls need more bunk space and stronger bunks than steers or heifers. Their larger size and aggressive behavior put more stress on equipment. Provide 30 to 36 inches of bunk space per bull and use reinforced concrete construction. Separate bulls by age and weight to reduce fighting. Never mix unfamiliar bulls in a pen with limited bunk space. Aggression at the bunk can cause serious injuries. ### Cows with Calves Cows with calves need wider bunks and more space. Provide 36 inches of bunk space per cow-calf pair. The extra space lets calves reach feed without being knocked aside by their mothers. Consider using a creep feeder or a separate [calf feeding area](/knowledge/animal-farming/dairy-cattle/calf-feeding-area-design-bottle-bucket-group-stations) if calves are not gaining well. Calves may not get enough feed when competing with cows at the bunk. ## Feed Bunk Design for Specific Feeding Systems Your feeding system affects bunk design. Match the bunk to the equipment and labor you have available. ### Total Mixed Ration Systems Total mixed ration (TMR) systems deliver a complete ration that includes forage, grain, and supplements mixed together. These systems need bunks that can hold the full ration without separation. Use bunks with a wide feed apron and a moderate slope. The apron should be 30 to 36 inches wide to hold the ration without spilling. The slope should be 10 to 12 percent to keep the ration within reach. TMR systems work best with fence-line bunks and a feed alley wide enough for the mixer. The mixer should be able to deliver along the full length of the bunk without repositioning. ### Limit-Fed Systems Limit-fed systems deliver a restricted amount of feed, usually to control weight gain or reduce feed costs. These systems need bunks that prevent cattle from consuming feed too quickly. Use bunks with headlocks or other restraints that give each animal a defined eating space. This prevents dominant animals from consuming more than their share. Provide at least 30 inches of bunk space per head in limit-fed systems. The extra space reduces competition and ensures all cattle get their allocated amount. ### Self-Feeders Self-feeders allow cattle to eat free-choice from a hopper that holds several days of feed. These systems reduce labor but require careful management to prevent overconsumption. Self-feeders work best for growing cattle on roughage-based rations. They are not suitable for high-concentrate finishing rations because cattle may overeat and develop acidosis. Place self-feeders on a concrete pad with good drainage. Clean the area around the feeder regularly to prevent mud buildup and feed spoilage. ## Water Access and Bunk Management Water access is part of bunk management. Cattle that cannot drink enough water will not eat enough feed. Check water supply when intake drops unexpectedly. ### Water Requirements Cattle drink 10 to 20 gallons of water per day, depending on temperature, ration, and body size. Provide at least 2 inches of linear water space per animal, or one water tank per 50 to 100 head. Place water tanks within 100 to 150 feet of the feed bunk. Cattle prefer to eat and drink in the same area. If water is too far from the bunk, cattle may drink less and eat less. ### Water Quality Test water quality regularly. Cattle will reduce intake if water is contaminated, unpalatable, or too warm. Clean water tanks weekly and remove algae, debris, and manure. In hot weather, consider adding shade over water tanks to keep water cool. Cattle prefer cool water and will drink more when water temperature stays below 70 degrees Fahrenheit. ## Feed Bunk Management Technology Technology can improve bunk management, but it does not replace daily observation. Use technology to supplement your own eyes and judgment. ### Bunk Scoring Apps Several smartphone apps help you record bunk scores and track intake patterns. These apps let you enter scores quickly and generate reports that show trends over time. Choose an app that works offline, since feedlot areas often have poor cellular coverage. The app should let you record scores by pen and date and export data for analysis. ### Automated Bunk Reading Some feedlots use automated systems that photograph bunks and analyze feed levels using image recognition. These systems can identify changes in bunk coverage that indicate intake problems. Automated systems are expensive and require reliable power and internet. They work best for large feedlots with many pens and limited labor. ### Feed Delivery Records Most modern mixer wagons have scales and data recording systems. Use these systems to track exactly how much feed you deliver to each pen. Review delivery records alongside bunk scores to calculate actual intake. This calculation is essential for adjusting rations and identifying problems. ## Designing a New Feed Bunk System If you are building new bunks, follow this step-by-step process to get the design right. ### Step 1: Define Your Needs Write down your current and projected cattle numbers, cattle sizes, and feeding system. Include your plans for the next 5 to 10 years. It is cheaper to build extra bunk now than to add it later. ### Step 2: Calculate Bunk Length Multiply your projected cattle numbers by the appropriate bunk space per head. Add 10 percent as a safety margin. Round up to the nearest standard bunk section. ### Step 3: Choose Bunk Type and Location Decide between fence-line and center-of-pen bunks based on your pen layout and feeding equipment. Choose a location with good drainage and access for delivery equipment. ### Step 4: Determine Dimensions Use the height, width, and slope recommendations in this guide to set your bunk dimensions. Adjust for your cattle size and management style. ### Step 5: Select Materials Choose concrete for permanent bunks. Select steel or wood only for temporary or portable applications. Factor in maintenance costs over the life of the bunk. ### Step 6: Plan for Drainage Ensure the pen slopes away from the bunk at a 2 to 4 percent grade. Install a concrete apron on the cattle side of the bunk to prevent mud. ### Step 7: Build and Test Construct the bunk according to your plan. Before putting cattle on the bunk, test it with your delivery equipment to ensure the equipment fits and can deliver feed along the full length. ## Renovating Existing Bunks If you have existing bunks that are not working well, you can often renovate them rather than rebuild. Common renovations include: ### Adjusting Bunk Height If bunks are too high or too low, you can adjust the standing surface rather than the bunk itself. Raise the standing surface by adding a concrete pad. Lower it by excavating the pen floor. This approach is often cheaper than rebuilding the bunk. It also lets you adjust the height as cattle grow. ### Widening the Feed Apron If feed spills over the front edge, the apron may be too narrow. Add a concrete extension to the front of the apron. Ensure the extension has the correct slope and a smooth finish. ### Improving Drainage If water collects around the bunk, improve drainage by regrading the pen or adding a drainage ditch. Install a perforated drain pipe along the feed alley to carry water away. ### Replacing Worn Surfaces If the concrete surface is worn or spalled, apply a new surface layer. Use a polymer-modified concrete overlay that bonds to the old surface and provides a smooth, durable finish. ## Feed Bunk Safety Safety matters for both cattle and workers. Poorly maintained bunks cause injuries that are costly and painful. ### Cattle Safety Inspect bunks regularly for sharp edges, protruding bolts, and other hazards. Cattle can cut their tongues and lips on damaged bunks, which reduces intake and requires treatment. Ensure the bunk height and slope are appropriate for the cattle using the bunk. A bunk that is too high forces cattle to strain, which can cause neck and shoulder injuries. ### Worker Safety Feed delivery is one of the most dangerous jobs on a feedlot. Mixer wagons and tractors can roll over, and workers can be caught between equipment and bunks. Train all workers on safe equipment operation. Establish clear procedures for backing up to bunks and delivering feed. Never allow workers to stand between a moving vehicle and a stationary bunk. Wear appropriate personal protective equipment when cleaning bunks, including gloves, eye protection, and dust masks. Feed dust can irritate eyes and lungs, especially when cleaning dry rations. ## Economic Considerations Feed bunks are a significant investment. Understanding the economics helps you make smart decisions about construction and management. ### Construction Costs Concrete bunks cost $15 to $30 per linear foot to construct, depending on local labor and material prices. A 200-foot bunk for 100 head costs $3,000 to $6,000. This investment lasts 20 to 30 years with proper maintenance. Steel and wood bunks cost less upfront but fail sooner. Over a 20-year period, concrete is usually the most economical choice. ### Waste Reduction Good bunk management reduces feed waste. A 5 percent reduction in feed waste on a 1,000-head feedlot can save $20,000 to $50,000 per year, depending on feed prices. The cost of daily bunk cleaning is small compared to the cost of wasted feed. Invest the time to clean bunks properly and adjust delivery to match intake. ### Labor Costs Bunk management takes time, and time is money. A well-designed bunk system reduces labor by making cleaning and delivery easier. Consider the labor costs when choosing bunk type and location. A bunk that is easy to reach and clean may cost more to build but saves labor every day for years. ## Frequently Asked Questions ### How much bunk space does a cow need? Provide 24 to 30 inches of linear bunk space per cow for most feedlot conditions. Calves under 600 pounds need 18 to 24 inches. Mature bulls need 30 to 36 inches. Increase space by 20 to 30 percent during heat stress or when feeding high-concentrate rations. ### What is the ideal feed bunk height? The feed surface should sit 18 to 24 inches above the ground for mature cattle weighing 1,000 to 1,400 pounds. Use 14 to 18 inches for calves under 600 pounds and 24 to 30 inches for bulls. The animal's mouth should be level with the feed surface when standing naturally. ### How often should I clean feed bunks? Clean bunks daily in most conditions. Remove all uneaten feed before adding fresh feed. In hot, humid weather or when feeding wet rations, clean more frequently. In cool, dry conditions with dry rations, you may clean every other day. ### How do I know if I am overfeeding my cattle? Check bunk scores before each feeding. If more than 10 percent of the previous delivery remains, you are overfeeding. Reduce the next delivery to match actual intake. The goal is to have bunks nearly empty at the next feeding time. ### Should I feed my cattle at the same time every day? Yes. Cattle thrive on routine, and consistent feeding times reduce stress and improve intake. Feed at the same time every day, including weekends and holidays. If you must change feeding times, do it gradually over several days. ### What is a bunk score and how do I use it? A bunk score is a visual assessment of how much feed remains in the bunk before the next feeding. The standard scale runs from 0 (empty) to 4 (full). Record the score for each pen daily and use it to adjust feed delivery. A sudden drop in intake, shown by high bunk scores, may indicate illness or feed quality problems. ### Can I use wood or steel for feed bunks? You can, but concrete is the best choice for permanent bunks. Wood absorbs moisture, splinters, and fails within 2 to 3 years. Steel corrodes when exposed to wet feed and acids. Concrete lasts 20 to 30 years with proper maintenance. ### When should I call a veterinarian about feed bunk issues? Call a veterinarian immediately if cattle in a pen go off feed suddenly, show signs of bloat, stagger or circle, or have difficulty breathing. Call within 24 hours if one or two cattle go off feed for more than 24 hours or if intake drops over several days without an obvious cause. ## Related Farming Guides This section will be populated with links to related farming guides after publication. ## 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.