By Andi Anderson
Spring is an important and busy season for cattle producers. As winter ends, pastures begin to grow, temperatures rise, and calving is often underway. While forage quality and calving management receive much attention, spring is also a critical time to review and adjust the herd’s mineral program.
One major concern during early spring grazing is grass tetany. This condition often occurs when cattle consume lush, fast-growing grasses that contain high levels of potassium. High potassium interferes with magnesium absorption in the rumen. When cows do not absorb enough magnesium, they can develop serious symptoms, including nervous behavior, poor coordination, muscle twitching around the face and ears, and weakness. In severe cases, cows may collapse, suffer seizures, and die quickly, making prevention extremely important.
The best way to reduce grass tetany risk is consistent magnesium supplementation. Magnesium is often difficult to feed because many sources are not very palatable. High-magnesium mineral blends are commonly used because they include ingredients that encourage intake. These minerals should be offered in late winter and continued through early spring, when the risk is highest.
Spring also places greater mineral demands on cows because many are entering early lactation. Milk production significantly increases the need for calcium and phosphorus. Cows producing more milk require higher amounts of these minerals to maintain health and body condition. Growing calves also need increasing levels of calcium and phosphorus to support bone growth and daily weight gain.
Mineral intake often rises during spring because cattle consume more fresh forage. Producers should monitor mineral consumption closely to ensure cows are neither under-consuming nor over-consuming minerals. Comparing the expected intake listed on the mineral label with actual use can reveal potential problems.
Simple management changes can help control intake. Placing mineral feeders near water or resting areas may increase consumption, while moving feeders away from these locations may reduce intake if cows are consuming too much.
Overall, spring creates new nutritional challenges for cow herds. Paying close attention to mineral supplementation helps prevent health issues, supports milk production, promotes calf growth, and sets the foundation for a productive grazing season.
Photo Credit: gettyimages-baranozdemir
Categories: Ohio, Livestock