Lulu, I've heard that too and have since given our cat a non-dairy cat milk occasionally for a treat. I like the idea of using real milk to help her when necessary.
Also, our vet recommends yogurt for our dog once a month for his gas (he is a STINKY dog when he gets stressed out
). Isn't it odd that they can't tolerate it yet it helps with this problem? I won't contemplate it too long since I'm just happy we found something that works!