Gerhard Harmse

I did not have the time to read all the comments. maybe this has been mentioned. In my opinion many of the negative effects mentioned in the article is due to the reduced feeding value of the feed. Fungi also eat! That does however not exclude the possible toxic effects. Try and get rid of them or prevent them from polluting feeds long before feeding them to the animals.

I stand under correction . As I understand it, the organic part of it protects the mineral from interactions in the rumen. It does however need to be released in the metal form to be absorbed. Please correct me.

I think that there remains little doubt about better absorbsion. I do however question the "additional" use of it over and above the well researched requirements for dairy cattle. Under certain cicumstances, like stress, the increase in copper in the diet may become a problem

In my opinion the organic minerals should not be "additional". I saw a cow (Jersey) on additional. She developed an intestinal problem (unrelated to copper) but after three developed copper toxicity (confirmed) Gerhard Harmse

Can ammonia overload (urea 1.4% and CP 25% of DM) from a high protein diet cause temporary and permanent damage to dairy cows (other than lowered fertility)?

Can ammonia overload (urea 1.4% and CP 25% of DM) from a high protein diet cause temporary and permanent damage to dairy cows (other than lowered fertility)?