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Ask the Vet
Mon Apr 14, 2014 10:49 AM CDT

QUESTION: Are spring-calving operations more prone to having their cows suffer from grass tetany? If so, what can a producer do to offset the chances of losing an animal to this condition?

ANSWER: Yes, I think the risk factors for grass tetany are greater with spring-calving cows. Grass tetany results from low magnesium levels in the bloodstream. Cool-season grasses, or winter annuals, tend to have lower levels of magnesium in winter and early spring under lush growing conditions.

Grass tetany is most common in mature cows in early stages of lactation. ...

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