# Cattle Feed Storage: Preventing Spoilage and Loss ## Key Takeaways - **Moisture is the primary driver of feed spoilage**, with hay baled above 15% moisture and grain stored above 14% moisture at high risk for microbial growth (yeasts, molds, bacteria) and subsequent nutrient degradation and toxin production. - **Oxygen fuels aerobic spoilage organisms**, necessitating tight packing and exclusion of air in fermented feeds like silage, while low moisture is critical for preventing spoilage in dry feeds like hay and grain. - **Temperature significantly impacts spoilage rates**, with molds thriving between 60-90°F; self-generated heat from microbial activity can lead to dry matter loss and, in extreme cases, spontaneous combustion in grain. - **Proper storage of hay involves elevating bales off the ground with good drainage and covering the top**, while grain requires storage at or below 14% moisture in clean, well-sealed bins with regular monitoring for hot spots and insect activity. - **Spoiled or moldy feed poses significant health risks**, including mycotoxin poisoning (e.g., aflatoxin) and botulism, necessitating prompt discarding of suspect feed and veterinary consultation if animals exhibit signs of illness. - **A "first-in, first-out" inventory system and regular monitoring (at least monthly) of moisture, temperature, and condition**, coupled with written records, are crucial for minimizing losses and ensuring feed quality. --- Feed is the largest single cost on most cattle operations, often accounting for 50 percent or more of total production expenses. When feed spoils or loses nutritional value before it reaches the animal, that investment is lost and cattle performance suffers. Poor storage practices can also create health risks, attract pests, and turn a well-planned feeding program into a constant battle against waste. This guide covers the practical side of cattle feed storage for beef producers of all operation sizes. It explains why feed spoils, how to store hay and grain to minimize losses, how to manage silage and byproduct feeds, and how to monitor stored feed so you catch problems before they cost you money. The guidance applies to small herd owners and commercial operations alike. ## At a Glance - Store hay off the ground with good drainage underneath and cover the top to protect against weather. - Keep grain at or below 14 percent moisture for long term storage in bins or sacks. - Clean bins thoroughly before adding new grain and check stored grain regularly for hot spots and insect activity. - Feed spoiled or moldy feed can cause serious health problems, including mycotoxin poisoning and botulism. When in doubt, discard it. - Use a first in, first out system so older feed is fed before newer feed. - Monitor stored feed at least monthly and keep written records of moisture, temperature, and condition. - Call your veterinarian if animals show signs of illness after eating suspect feed. ## Why Feed Spoils Feed spoilage is a biological process. Yeasts, molds, bacteria, and insects all need moisture, warmth, and oxygen to grow. When those conditions exist in stored feed, microbial activity multiplies, consuming nutrients and producing heat, toxins, and waste products that ruin the feed. ### Moisture Is the Primary Driver Most spoilage organisms require water to survive and reproduce. Hay baled above 15 percent moisture is at risk for mold growth. Grain stored above 14 percent moisture creates conditions where fungi and bacteria thrive. The exact threshold varies by feed type and storage method, but the principle holds across all stored feeds: excess moisture invites spoilage. Moisture can enter stored feed in several ways. Rain and snow can penetrate uncovered stacks. Ground moisture can wick up into bales sitting directly on soil. Condensation can form inside covered piles or bins when temperature changes cause moisture to move from warm feed to cooler surfaces. Poorly sealed bins can allow humid outside air to reach the grain. ### Oxygen Fuels the Process Most spoilage organisms are aerobic, meaning they need oxygen. Hay stored in loose stacks has plenty of air circulating through it. Grain in a bin has air in the spaces between kernels. Silage, by contrast, is packed tightly to exclude oxygen, which is why it can be stored for long periods without spoiling. The key to preventing spoilage in dry feeds is keeping moisture low. The key to preventing spoilage in fermented feeds is keeping oxygen out. Understanding this distinction helps you choose the right storage method for each feed type. ### Temperature Affects Spoilage Rate Microbial growth accelerates as temperature rises into the range that suits each organism. Molds grow well between 60 and 90 degrees Fahrenheit. When microbial activity generates its own heat, the problem compounds. A hot spot in a grain bin can reach temperatures high enough to cause substantial dry matter loss and even spontaneous combustion in extreme cases. Temperature also drives moisture movement in stored grain. Warm grain in the center of a bin pushes moisture outward toward cooler grain near the bin walls. This can create localized wet areas where spoilage begins even when the average moisture content of the grain is acceptable. ## Hay Storage for Cattle Hay is the backbone of most cattle feeding programs, and it is also one of the most commonly wasted feeds on the farm. Storage losses can range from 5 percent for hay stored in a well-ventilated barn to 30 percent or more for round bales left on the ground in wet climates. Those losses represent real money. ### Choosing a Storage Site The best hay storage site is well drained, open to wind, and away from trees and buildings that could block airflow. A slight slope helps water run away from the stack. Avoid low spots where water pools after rain. If you must store hay in a field, choose the highest, driest area available. Gravel or crushed rock makes an excellent base for hay storage. It keeps bales off the soil, provides drainage, and prevents the bottom layer from wicking moisture. A 6 inch layer of 3/4 inch gravel works well for most operations. If gravel is not available, old pallets or tires can keep bales off the ground, though these do not provide the same level of drainage. ### Bale Orientation and Stacking How you orient bales in storage affects how much water they absorb from rain and snow. Round bales stored with their flat ends facing the prevailing wind shed water better than bales stored with the curved side facing the wind. When bales are lined up end to end, the gaps between bales allow water to run off rather than soak in. Stacking hay more than two bales high increases the risk of damage. The weight of upper bales compresses lower bales, which can force moisture into the lower layers and reduce airflow. Two bales high is the practical maximum for most operations. ### Covering Hay A tarp or other cover protects hay from rain and snow, but it must be secured properly. A loose tarp can flap in the wind, rub holes in the hay, and trap moisture against the bales. Secure tarps with straps or weights placed at regular intervals. Leave the sides open where possible to allow air movement, and make sure the cover sheds water away from the stack rather than funneling it into the bales. Plastic net wrap on round bales provides some protection from weather but is not a substitute for proper storage. Net wrap keeps the outer layer of hay intact and sheds some water, but it does not prevent moisture from entering the bale through the ends or from the ground. ### Indoor Hay Storage Storing hay inside a barn or shed provides the best protection from weather losses. A well-ventilated barn allows air to circulate through the hay, keeping moisture low and reducing the risk of mold. The key is ventilation. A closed, humid barn can cause as many problems as outdoor storage. When storing hay in a barn, leave space between bales and between the hay and the walls. This allows air to move and makes it easier to inspect the hay for signs of spoilage. Do not stack hay against a wall that could transfer moisture from the ground or outside. ### Dry Hay vs. Baleage Baleage, also known as haylage in round bales, is a different product from dry hay. Baleage is baled at higher moisture, typically 40 to 60 percent, and wrapped in plastic to exclude oxygen. The forage ferments and can be stored for months as long as the plastic remains intact. Baleage requires careful attention to plastic integrity. Any tear or puncture allows oxygen to enter, and spoilage begins immediately. Check wrapped bales regularly for damage and patch holes promptly with appropriate tape. Store wrapped bales on a clean, well-drained surface to prevent the plastic from being punctured from below. ## Grain Storage for Cattle Grain is a concentrated energy source that is easy to store when handled correctly. The same principles that apply to hay storage apply to grain, but the stakes are higher because grain is more vulnerable to spoilage and contamination. ### Moisture Content Targets Grain must be dry before it goes into long term storage. The safe moisture content depends on the grain type and the expected storage duration. | Grain Type | Safe Moisture for Up to 6 Months | Safe Moisture for 1 Year or More | |---|---|---| | Corn | 15 percent | 13 to 14 percent | | Sorghum | 14 percent | 12 to 13 percent | | Wheat | 14 percent | 13 percent | | Oats | 14 percent | 13 percent | | Barley | 14 percent | 13 percent | These figures assume clean grain with minimal fines and dockage. Grain with high levels of fines and broken kernels does not store as well as clean grain because fines restrict airflow and provide more surface area for mold growth. ### Bin Preparation A clean bin is the first step to good grain storage. Before adding new grain, remove all old grain and debris from the bin. Sweep the walls and floor to remove dust, mold, and insect residue. Look for signs of previous spoilage, such as crusted grain on the walls or a musty odor, and address those problems before loading new grain. Inspect the bin structure itself. Check for holes or gaps that could let water in or allow rodents and birds to enter. Make sure the roof is sound and the vents are clear. Repair any damage before filling the bin. ### Filling the Bin Spread grain evenly when filling a bin to minimize the concentration of fines. Fines tend to accumulate in the center of the bin under the fill spout, creating a column of material that restricts airflow and holds moisture. Use a spreader if available, or move the fill spout around the bin to distribute fines more evenly. Level the grain surface after filling. A peaked surface creates a center high spot where moisture can accumulate. Leveling also makes it easier to inspect the grain surface and to measure grain depth accurately. ### Aeration Aeration moves air through stored grain to control temperature and moisture. The goal is to keep grain temperature close to the average outside temperature and to prevent moisture migration that creates wet spots. Run aeration fans when the outside temperature is cool and dry. The best time to aerate is in the fall, when outside temperatures are dropping, to cool the grain for winter storage. Aeration in the spring can help equalize grain temperature and reduce condensation on bin walls. The amount of airflow needed depends on the bin size and the grain type. A general guideline is 0.1 to 0.2 cubic feet per minute per bushel for cooling stored grain. Larger bins and wetter grain require more airflow. ### Checking Stored Grain Inspect stored grain at least monthly. Check the grain surface for crusting, mold, or discoloration. Smell the grain when you open the bin. A musty or sour odor indicates spoilage is underway. Look for signs of insect activity, including webbing on the grain surface, live insects, or damaged kernels. Check grain temperature in multiple locations. A thermometer probe inserted into the grain can detect hot spots that are not visible from the surface. A temperature rise of 10 degrees or more above the expected level indicates microbial activity and requires immediate attention. If you find a hot spot, run the aeration fan to cool the grain and equalize temperature. If the problem persists, the affected grain may need to be moved or fed immediately. ### Grain Bags and Temporary Storage Grain bags, also called silo bags, offer a flexible storage option that is popular in some regions. These large plastic tubes hold grain in an oxygen-limited environment, similar to silage storage. Grain bags work well for temporary storage and can preserve grain quality for up to a year when properly sealed. The key to grain bag success is proper filling and sealing. The bag must be filled evenly and packed tightly to exclude oxygen. Any tear or puncture in the bag allows air to enter and spoilage begins. Check grain bags regularly for damage and patch holes promptly. ### On-Farm Grain Storage vs. Commercial Storage Small operations may choose to store grain in sacks, bins, or even in a clean, dry room. The principles remain the same: keep the grain dry, cool, and protected from pests. For larger operations, commercial storage may be more practical, especially when grain is purchased in bulk and fed over several months. When buying grain for storage, ask the seller about moisture content and storage history. Grain that has been stored improperly may already have mold or insect damage before it reaches your farm. ## Silage and Haylage Storage Silage and haylage are fermented feeds that preserve forage through anaerobic fermentation. The [fermentation process](/knowledge/molecular-biology/fermentation-process) produces acids that lower the pH and inhibit spoilage organisms. The key to successful silage storage is creating and maintaining an oxygen-free environment. ### Silo Types and Management The three main silo types are tower silos, bunker silos, and silage bags. Each has its own management requirements. Tower silos require careful filling to achieve good packing and to avoid bridging, where silage sticks to the walls and creates a hollow center. Bunker silos require rapid filling and tight packing to exclude oxygen. Silage bags require proper filling equipment and regular inspection for damage. ### Packing Density Packing density is the most important factor in bunker silo management. The goal is to pack the silage tightly enough to exclude oxygen and promote proper fermentation. A packing density of 15 to 18 pounds of dry matter per cubic foot is a reasonable target for most bunker silos. Pack in thin layers, no more than 6 inches thick, and pack continuously while filling. The more weight you can put on the silage during filling, the better the packing. Use a heavy tractor and pack each layer thoroughly before adding the next. ### Sealing the Silo The silage surface must be sealed to exclude oxygen. Use a plastic cover weighted down with tires or other materials to hold it in place. The cover should extend beyond the edges of the silage to prevent water from running down the sides. Check the cover regularly for damage and repair any tears or holes promptly. A cover that lifts or flaps in the wind allows air to enter the silage and spoilage begins at the surface. ### Feedout Rate The rate at which you remove silage from the face affects spoilage. A slow feedout rate allows oxygen to penetrate the silage face and cause spoilage. In warm weather, remove at least 6 inches from the face each day. In cooler weather, you can remove less. Keep the face smooth and vertical. A rough face with chunks of silage falling off creates more surface area for spoilage. Use a defacer or silage facer to keep the face clean and even. ### Silage Additives Silage additives are products designed to improve fermentation or reduce spoilage. Inoculants add beneficial bacteria that produce lactic acid more efficiently. Chemical additives can inhibit mold growth or improve nutrient retention. Additives can be useful in certain situations, such as when harvesting at less than ideal moisture or when weather conditions make good fermentation difficult. However, they are not a substitute for good silage management. The most important factors are moisture content at harvest, packing density, and proper sealing. ## Byproduct Feeds and Wet Feeds Many cattle operations use byproduct feeds such as distillers grains, brewer's grains, corn gluten feed, and bakery waste. These feeds can be excellent value, but they present unique storage challenges because many are high in moisture and spoil quickly. ### Wet Byproducts Wet distillers grains and other wet byproducts have a short shelf life. In warm weather, they can spoil within days. Store wet byproducts on a concrete pad or other impermeable surface to prevent contamination with soil and to allow drainage. Cover them to keep out rain and direct sunlight. Plan to feed wet byproducts within 3 to 7 days of delivery, depending on the temperature and the specific product. In hot weather, feed them even faster. Some operations add preservatives to extend the storage life of wet byproducts, but these products are not always cost effective. ### Dry Byproducts Dry byproducts such as dried distillers grains and soybean hulls store much better than their wet counterparts. Store them in a dry, clean area protected from rain and rodents. Follow the same moisture and temperature guidelines as for grain storage. ### Bakery Waste and Other Perishable Feeds Bakery waste, fruit and vegetable culls, and other perishable feeds can be a low cost feed source, but they spoil quickly. These feeds should be fed within a day or two of delivery. Do not store them for extended periods unless you have a preservation system in place. ## Preventing Mold and Mycotoxin Problems Mold in feed is not just a quality issue. Some molds produce mycotoxins that can cause serious health problems in cattle. Mycotoxin poisoning can cause reduced feed intake, poor weight gain, reproductive problems, and in severe cases, death. ### Common Mycotoxins in Cattle Feed Aflatoxin is produced by certain Aspergillus molds and is one of the most concerning mycotoxins in cattle feed. It can cause liver damage, reduced performance, and immune suppression. Fumonisin, vomitoxin, and zearalenone are other mycotoxins that can affect cattle, though cattle are generally less sensitive to some of these than other livestock species. Mycotoxin contamination is more common in certain conditions. Drought stressed corn, delayed harvest, and poor storage conditions all increase the risk. If you suspect mycotoxin contamination, have the feed tested by a laboratory. ### Testing for Mycotoxins [Feed testing for mycotoxins](/knowledge/animal-farming/farm-management/feed-testing-for-mycotoxins-when-and-how-to-test) is available through commercial laboratories and some state veterinary diagnostic laboratories. The cost varies depending on the number of mycotoxins tested and the type of feed. Testing is especially important when feeding grain from stressed crops or when cattle show unexplained health problems. Work with your veterinarian or extension agent to determine the appropriate testing protocol for your situation. They can help you interpret test results and decide whether the feed is safe to use. ### Managing Moldy Feed If you have feed that shows visible mold growth, you face a difficult decision. Feeding moldy feed can cause health problems, but discarding it is expensive. The decision depends on the type and extent of mold, the presence of mycotoxins, and the class of cattle being fed. In general, feed with visible mold should not be fed to young calves, pregnant cows, or breeding stock. These animals are more susceptible to mycotoxin effects. Mature, healthy cattle can sometimes tolerate low levels of mold contamination, but even then, the feed should be tested for mycotoxins before feeding. Diluting moldy feed with clean feed can reduce the concentration of mycotoxins, but it does not eliminate the risk. This practice is risky and should only be considered with veterinary guidance and mycotoxin testing. ## Pests and Rodent Control Rodents, birds, and insects can contaminate feed and consume significant quantities of stored feed. A single rat can consume 25 to 50 pounds of feed per year and contaminate much more with droppings and urine. ### Rodent Control Good sanitation is the first line of defense against rodents. Keep the area around feed storage clean and free of debris that could provide shelter. Store feed in rodent proof containers or bins. Seal any gaps or holes in buildings where rodents could enter. Trapping and baiting programs can reduce rodent populations. Bait stations should be placed strategically around feed storage areas and checked regularly. Work with a pest control professional if you have a serious rodent problem. ### Bird Control Birds can consume significant amounts of feed and contaminate it with droppings. Exclude birds from feed storage areas by keeping doors closed and sealing openings. Netting and bird proofing can be effective in larger storage facilities. ### Insect Control Insects can damage stored grain and contaminate feed. Clean bins before filling and inspect stored grain regularly for signs of insect activity. If you find insects, the grain may need to be treated with an approved insecticide or moved to clean storage. Temperature management is an effective insect control strategy. Cooling grain below 60 degrees Fahrenheit slows insect activity, and cooling below 40 degrees kills many insect species. ## Common Feed Storage Mistakes Even experienced producers make storage mistakes that cost them money. Here are the most common problems and how to avoid them. ### Storing Hay on the Ground Hay stored directly on soil absorbs moisture from the ground. The bottom layer of bales often rots, and the damage can extend upward into the stack. Always store hay on a well-drained surface with some type of barrier between the hay and the soil. ### Ignoring Small Leaks A small roof leak or a tear in a silage bag seems minor, but it allows moisture and oxygen to enter stored feed. The damage spreads far beyond the visible spot. Fix leaks and patch holes as soon as you find them. ### Overfilling Bins Grain bins have a rated capacity for a reason. Overfilling a bin can restrict airflow, stress the bin structure, and make it difficult to inspect the grain surface. Fill bins to their rated capacity or less. ### Feeding Spoiled Feed to Save Money It is tempting to feed spoiled feed rather than throw it away, especially when feed prices are high. But the cost of spoiled feed goes beyond the feed itself. Reduced performance, health problems, and veterinary bills can far exceed the value of the salvaged feed. ### Not Keeping Records If you do not track what you store, how long it has been stored, and how it performs, you cannot make informed decisions about feed management. Simple records of storage dates, moisture content, and feedout rates help you identify problems and improve your system over time. ## Monitoring and Recordkeeping Regular monitoring is essential for successful feed storage. A few minutes of inspection each week can prevent major losses. ### What to Check Check stored feed for visible signs of spoilage, including mold, discoloration, and off odors. Check for pests and signs of pest activity. Check storage structures for damage that could allow moisture or pests to enter. For grain, check temperature and moisture content. For silage, check the feedout face and the condition of the plastic cover. For hay, check the bottom layer of bales for moisture damage and the top layer for weather damage. ### How Often to Check Check stored feed at least monthly, and more often during warm, humid weather when spoilage risk is highest. Check grain bins weekly during the fall when temperature changes are greatest. Check silage covers and grain bags after major weather events. ### Keeping Records Maintain a simple log of your feed storage activities. Record the date, the feed type, the storage location, and any observations. Note any problems you find and the actions you took to address them. This record helps you track the condition of stored feed over time and identify recurring problems. Record the moisture content of grain at harvest and at intervals during storage. Record the temperature of stored grain and any aeration you perform. These records help you understand how your storage system is performing and make adjustments as needed. ## When to Call a Veterinarian Most feed storage problems are managed without veterinary involvement, but there are situations where you need professional help. ### Signs of Feed Related Illness If cattle show signs of illness after eating stored feed, contact your veterinarian immediately. Signs of feed related illness include: - Sudden death - Reduced feed intake - Weight loss or poor weight gain - Diarrhea - Lethargy or depression - Neurological signs such as incoordination or tremors - Abortions or reproductive problems - Difficulty breathing These signs can indicate mycotoxin poisoning, botulism, or other serious conditions. Early veterinary intervention can save animals and help you identify the source of the problem. ### When to Request a Feed Analysis If you suspect feed related illness, your veterinarian may recommend a feed analysis. Collect samples from the suspect feed and have them tested for mycotoxins, mold, and other contaminants. Your veterinarian can help you interpret the results and determine the appropriate course of action. ### Botulism Risk Botulism is a particular concern with spoiled feed. Clostridium botulinum bacteria produce a toxin that causes progressive paralysis and can be fatal. Cattle can contract botulism from eating spoiled silage, haylage, or other feed that contains the toxin. Botulism is a reportable disease in many areas. If you suspect botulism, contact your veterinarian and your state animal health official immediately. Do not move affected animals or feed until you have received guidance. ## When to Call an Extension Agent Your local extension agent can be a valuable resource for feed storage questions. Extension agents can help you: - Choose the right storage system for your operation - Interpret feed analysis results - Develop a monitoring plan for stored feed - Identify local resources for feed testing and pest control - Connect you with other agricultural professionals who can help Extension agents are especially helpful when you are making changes to your feed storage system or when you are dealing with a recurring problem that you cannot solve on your own. ## Economic Considerations Feed storage is not free, and the cost of storage must be weighed against the value of the feed saved. A well-designed storage system can pay for itself quickly through reduced losses and improved feed quality. ### Calculating Storage Costs The cost of feed storage includes the initial investment in storage structures, ongoing maintenance, and the value of the space used. For hay, the cost of a barn or shed can be substantial, but it may be justified by the reduction in storage losses. Compare the cost of storage to the value of the feed saved. If hay loses 25 percent of its value when stored outdoors and 5 percent when stored in a barn, the barn saves 20 percent of the hay value each year. Over several years, the savings can exceed the cost of the barn. ### Hidden Costs of Poor Storage Poor storage has costs beyond the obvious loss of spoiled feed. Cattle that eat lower quality feed gain weight more slowly, which means longer feeding periods and higher overall feed costs. Spoiled feed can cause health problems that require veterinary treatment. Pests attracted to stored feed can spread disease and contaminate other feeds. When you calculate the true cost of poor storage, the investment in better storage often looks more attractive. ## Managing Feed Inventory Knowing what you have in storage and how long it will last helps you plan feeding programs and avoid running out of feed mid season. ### Tracking Inventory Keep a running inventory of stored feed by type, location, and date of storage. Estimate the amount of each feed you have on hand and the rate at which you are using it. This information helps you plan purchases and identify potential shortages. ### First In, First Out Use the oldest feed first. This simple rule ensures that feed does not sit in storage too long and that you always have a fresh supply. Mark storage dates on bales, bins, and bags to make it easy to identify older feed. ### Planning for Weather and Market Conditions Feed storage decisions are influenced by weather and market conditions. A wet harvest may force you to store wetter grain than you would like. High feed prices may make it worthwhile to invest in better storage. Low prices may make it more economical to sell feed rather than store it. Stay flexible and adjust your storage plans as conditions change. The goal is to have quality feed available when you need it at the lowest reasonable cost. ## Conclusion Cattle feed storage is a critical skill for any beef producer. The principles are straightforward: keep dry feed dry, keep fermented feed oxygen free, protect feed from pests, and monitor stored feed regularly. The costs of good storage are modest compared to the value of the feed saved and the health problems avoided. Start by evaluating your current storage system. Look for the sources of loss in your operation and prioritize the changes that will save the most feed for the least investment. Whether you store hay in a barn, grain in a bin, or silage in a bunker, the same fundamentals apply. Plan your storage with the same care you give to your feeding program, and you will see the results in better cattle performance and lower feed costs. ## Frequently Asked Questions ### How long can I store round bales outside? Round bales stored outside on the ground can lose 20 to 30 percent of their dry matter over a winter, depending on your climate and the quality of the bale. Bales stored off the ground on gravel with a cover lose much less, often under 10 percent. In humid climates, even covered bales stored outside will lose some quality over time. Plan to feed outside stored hay within 6 to 12 months of harvest for best results. ### What moisture level is safe for storing grain? The safe moisture level depends on the grain type and how long you plan to store it. For corn stored up to 6 months, aim for 15 percent moisture or less. For storage longer than 6 months, dry corn to 13 to 14 percent. Other grains have similar targets, generally between 12 and 14 percent for long term storage. Grain that is too wet will spoil quickly, while grain that is too dry may crack and lose quality. ### Can I feed moldy hay to my cattle? Feeding moldy hay is risky. Some molds produce mycotoxins that can cause serious health problems, and even mold that does not produce toxins can reduce feed intake and cause respiratory irritation. Hay with heavy visible mold should not be fed to cattle. If the mold is light and only in spots, you may be able to discard the moldy portions and feed the rest, but this should only be done with veterinary guidance and testing for mycotoxins. ### How do I know if my silage has spoiled? Spoiled silage has a distinctive appearance and smell. Good silage has a pleasant, slightly sour smell similar to pickles or vinegar. Spoiled silage smells musty, rotten, or like tobacco. Visibly spoiled silage appears dark, slimy, or has visible mold growth. Silage that heats up when exposed to air is also spoiling. If you have any doubt about silage quality, do not feed it without testing. ### What is the best way to store grain bags? Grain bags need a clean, level surface free of rocks and debris that could puncture the plastic. The site should be well drained so water does not pool under the bag. Check the bag regularly for tears or punctures and patch them promptly with the tape designed for this purpose. Rodents can chew through grain bags, so control rodents in the area. Most grain bags are designed for storage up to one year, though feed quality can decline over time. ### How often should I check my stored feed? Check stored feed at least monthly throughout the year. Check more frequently during warm, humid weather when spoilage risk is highest. Check grain bins weekly during the fall and spring when temperature changes cause moisture movement. Check silage covers and grain bags after any storm or high wind event. Regular checks take only a few minutes and can catch problems before they become expensive. ### What should I do if I find a hot spot in my grain bin? A hot spot in a grain bin indicates active spoilage. Run the aeration fan to cool the grain and equalize temperature. If the hot spot does not respond to aeration, the affected grain may need to be moved to another bin or fed immediately. Wear a dust mask and take precautions when entering a grain bin, as grain bins can be hazardous. Never enter a bin while unloading equipment is running. ### Can I store different types of feed together? Storing different feeds together can create problems. Feeds with different moisture contents should not be stored together because moisture will move from the wetter feed to the drier feed. Feeds with different particle sizes can separate and create pockets of fines that restrict airflow. Feeds with strong odors can transfer those odors to other feeds. Store different feed types separately whenever possible, and always clean storage areas between different feed types. ## Related Farming Guides This section will be populated with links to related farming guides from the same collection. Check back soon for more resources on cattle nutrition, forage management, and beef production systems. ## 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.