Thats cool! I want to do that too. Im thinking of having child door locks and door stoppers so the cat can get into certain rooms but the dog can't. I saw a youtuber have them with his GSD WL and his cat and it seems to work fine for them!I have a cat and a working line GSD. He’s 10 months old right now. He has a fair amount of prey drive and did chase the cat from the beginning. We have worked to get him to respect the cat more by using a variety of techniques. We are at the point now that he will play with the cat (we allow it when she’s not on the floor because he’s big and goofy and doesn’t know his strength). He will also let the cat walk around the house. If she’s running, it’s still fair game in his mind. So we are sure to have gates and escape points throughout the house.
IMO, kids are easier to train for than cats. Because cats are cats and they don’t listen 😂