What are the symptoms of a copper or zinc deficiency?
Table 2 summarizes the potential effects of a copper and/or zinc deficiency in both cows and bulls. The main effects of copper and zinc deficiencies are a reduction in reproductive efficiency; delayed estrus, decreased conception rates and increased dystocia. In my opinion, I also believe that much of the footrot I see in Montana is related to trace mineral deficiencies because zinc and iodine supplementation appears to cure the problem. Table 2.
