Lala

I have a five month old lab that is totally awesome apart from a few things. The main one is we have a 2 month old cavalier and a eleven week old kitten and he thinks they are toys. Sol picked my kitten up by it’s fur and ran around with it. I think he was playing, it wasn’t aggression but this is not the behavior I want. I trained him to leave it but with animals it’s different. He has chews and stuff instead to chew but not interested. Please help....