Getting a Good Sample
The first step is making sure your sample represents what the cattle will eat. Always sample by “lot,” meaning hay or forage that comes from the same field and cutting. Never mix bales from different cuttings or pastures into one sample. Also consider timing, sampling right before feeding shows the most accurate nutrient value since it includes any storage losses. Use a hay probe or core sampler when possible and collect at least 20 cores from different bales in a lot. For chopped silage or baleage, take grab samples from several locations and mix them. Once collected, combine samples in a clean bucket, mix thoroughly, and seal in a heavy-duty plastic bag. For high moisture feed, freeze the sample until it’s shipped to the lab.
Labeling and Shipping
Clear records are just as important as a good sample. Label each bag with your name, lot ID, harvest date, and forage type (i.e. “2nd cutting orchardgrass, Field A”). On the lab paperwork, note any details about maturity, legume content, or suspected issues like mold. Ship samples quickly, preferably early in the week. Use ice packs or freeze high moisture feeds like silage to keep it from spoiling.
Choosing a Lab and Tests
When looking for a place to send samples, look for an accredited lab certified by the National Forage Testing Association (NFTA). Most routine analyses are done with Near-Infrared Reflectance Spectroscopy (NIRS), which is fast and affordable, but the “gold standard” for feed analysis is wet chemistry and can be more accurate for some feed types. At minimum, request tests for dry matter (DM), crude protein (CP), acid detergent fiber (ADF), and neutral detergent fiber (NDF). These values allow the lab to also calculate energy, like TDN. Optional tests like nitrates, minerals, or fiber digestibility are worth considering if you suspect specific issues or are feeding high-risk forages like sorghum or drought-stressed hay.
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Feed Sampling
Testing your forage and feed is one of the most valuable steps you can take to make sure your cattle are meeting their nutritional needs. By collecting good samples, choosing the right tests, and understanding the results, you can save money, improve animal performance, and avoid unexpected problems.