Ditto that
Also-on predatory instincts and having your dog around prey animals (not that cats are prey animals but they can be with a big enough dog)-my dog, after a LOT of work can be around my bunnies unsupervised. I totally trust him and he's accepted that these rabbits are NOT food items

However he can exercise lots of predatory behaviors anywhere else and this does not have him acting towards them in an aggressive manner. He's very prey driven, and he chases rabbits in the park -but not at home.
So I would argue alongside that tug and other prey-type games and toys will actually decrease his need to hunt by giving it an outlet, also that dogs can understand who's part of the family and not for dinner-and seperate that from who is ok to chase
Crio has several cats and dogs living in harmony-as do many members on here and they can definitely assist you with some techniques for itnroduction of your dog to your cats-as well as help if their are any hiccups