[Buttermilk]

The zwartbles year books warn about copper poisoning as the breed is susceptible.

[shep53]

Please also remember that certain land area's are copper deficient and then you need to supplement your sheep . while I have seen many copper deficient sheep and cattle iv'e never seen  copper poisoning , even when some breeders feed extra copper because it can  make black sheep even blacker and shine'er  ( not condoning just stating )