Mineral deficiencies are among the most common and most preventable causes of livestock welfare problems. Understanding the link between mineral nutrition and welfare guides better farm management.
Mineral nutrition sits at the intersection of farm management and animal welfare in a way that is often underappreciated. The suffering caused by severe mineral deficiency — the neurological deterioration of copper-deficient lambs, the acute distress of hypomagnesaemia in cattle, the muscle pain of selenium-deficient calves — is entirely preventable with appropriate supplementation. Less severe subclinical deficiency causes chronic welfare compromise — reduced immunity, impaired healing, suppressed reproduction — that is invisible without testing but represents substantial ongoing harm. The challenge is that optimal mineral nutrition requires knowledge of regional and seasonal variation in soil and pasture mineral content, and the common-sense approach of supplementing with a broad mineral mix can cause toxicity in animals already adequately supplied. Veterinary-guided mineral management based on blood testing is the welfare-positive approach.