I gave my cat 3 cups of goat milk yesterday & he loved it! I was wondering if there may be any possible negative side effects for this. At first I gave him a small amount in a bowl just to see if he would drink it, and boy did he slurp it up quick, and so I kept giving him more. Before I knew it I was hearing a weird purring that he has never made before (of a different type, because he does purr a lot) also he had a hicc-up. And he ran to the door shortly after as if he had the runs... Any advice?