One of my Labs is sick when given cow's milk but fine on goats. Horrid to see your pets unwell and having 4 Labs, one a chocolate one, I sympathise. I am currently feeding up our eldest female after haveing a litter of pups, they are all gone now but I felt she needed some extra food so give her, some scrambled egg in the morning and a few sardines in oil some nights, she looks heaps better now, hope things continue to get better, just like children, animals are a worry to us too!