Drought conditions are almost always associated with the possibility of elevated nitrate levels in forages. According to information by Dairyland Laboratories, many tested feed samples from Minnesota, Nebraska, North Dakota and South Dakota in 2026 have confirmed nitrate levels of more than 1,000 parts per million nitrate-nitrogen. Drinking water also needs to be checked for nitrates.
Ruminants are particularly susceptible to nitrate poisoning because microbes in the rumen convert nitrate into nitrite, writes Mike Rankin.
Source: Hay and Forage Grower, September 29, 2026. Link. Under normal conditions, nitrite is converted into ammonia and used by rumen microbes. When plant nitrate levels elevate, nitrite accumulates in the rumen faster than it can be converted, and excess nitrite enters the bloodstream. This inhibits the blood’s ability to carry oxygen effectively and limits the amount of oxygen going to the animal’s tissues.
INSIGHTS: For producers in drought-affected areas, the priority is to test feeds so that a safe feeding regimen can be developed. For animal health pros, sharing this article could save cattle and provide a proactive opportunity to collaborate with nutritionists in support of local livestock producers. Other areas may also be at risk.
Related: Take stock of forage supply before winter feeding begins, BEEF, October 2, 2026. Link. Forage supplies may be tight this winter, so now is a good time for cattle producers to evaluate forage supplies and develop a feeding plan for winter.
Image: Link.
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