Easy...get a cat door and put it on the laundry room door as we did when we had our Sheltie and cats in the House. Our cats are never were allowed out. They liked their own place. Its their litter box area. Today...no dog.
Lol, my dog is a 5 pound Yorkie. He is smaller than all of the Cats. He would love that idea! Free access to cat food, oh boy!
Actually we do have a cat door that goes outside. Right now the dog is the only one that can use it because he has a chip on his collar. I could get Max a collar, put a chip on it and then he could go out when he wants.
He was a formerly feral cat that I adopted 15 years ago. And I’m guessing he’s probably 16 or 17, so he spends most of his time sleeping inside. But he still likes to go outside now and then and acts kind of cooped up if he doesn’t get to go. We have a fenced backyard so he is safe out there. Although it’s pretty cute, he likes to follow me and the dog around the property for our walks. If I shut the gate behind us then he stands at the gate meowing terribly, feeling abandoned.