Is it okay to give ferrets milk?

Ferrets are lactose intolerant and cannot digest any dairy products.

Dairy products such as milk can cause loose stools or diarrhea in ferrets.

Advise from another contributor:

we have five ferrets and have done quite a bit of research over the years, and i read on a few occasions that ferrets are lactose intolerant and therefore it is not good to give them milk as it can give them diarrhea. we also learned this as we gave one a small amount of milk and he had diarrhea. poor little thing.