Cats, dogs, pretty much all mammals NEVER drink milk once they leave mom! It's not normal. And don't you think it's gross to drink someone else's milk? It's not healthy! But we all have are opinions so....
I made a Forum Website for Vegans (Vegetarians are aloud too ) Please join! Here is the link! Tell me if you have any concerns about it!
http://veganforums.forumotion.com/