Hi, i have a 13 year old cat and iv been giving him lactose free milk for the past while because im lactose intolerent. Just recently iv learned that it is bad for them because it gives them diahrea but i havn't seen him have diahrea, could it be because im giving him lactose free milk?. Also, I was wondering if there are any other bad effects that milk could cause and if i should continue giving him milk. Thanks for your time, Brian