Limestone is often used in compound or premixed animal feed as it provides the necessary calcium contribution for a healthy livestock diet. Calcium deficiency can cause limitations in growth, reduced milk yield, poor bone structure and, during calving season, milk fever, the most common metabolic disease affecting dairy cattle.

Calcitic limestone contains 36-38% calcium and can safely be fed free choice (ad lib) mixed with salt. Dolomitic limestone contains at least 5 % magnesium carbonate and should not be used for poultry, but it is as good as calcitic limestone for other animals. Portland and natural cement can be used instead of limestone.