To keep your dog and your cat from fighting it’s it’s never a bad idea to have your dog used to cats. That first four months of their lives are a great opportunity to acclimate them to cats so that they don’t think that this is some strange animal they’ve never seen before, and be overly curious about learning about that animal; so your dog is, hopefully, used to cats. Then, you have to remember that dogs and cats are typically at odds. Cats appear as prey to dogs, and many dogs are driven to chase them. So, if you can eliminate the opportunity for the cat to run away from the dog then sometimes that’ll resolve issues. So, have a place for the cat to go where the dog can’t get to; a room, or a baby gated hallway, or something like that, and then very closely supervise your dog and cat together.Make sure that they’re used to getting along, that they’ve met each other, that the cat isn’t enticing the dog to chase the chase him or her. And hopefully, then you can develop a calm and relaxing relationship between the two different species. .