I think playing is fine, so long at the dog doesn't bite at all at the cat. My cat will try to play with the dogs some, and one dog will chase her, but I don't allow them to carry on with it. I don't allow my dogs to even 'play' bite my cat. I'm worried they might one day bite to hard or something so I just don't allow it. Maybe I'm just paranoid though, but my dogs didn't exactly like my cat to start off so I kinda had to be They get along great now