If you can't find a way to limit your dog to the kitchen, maybe you could get a doggy door installed. I have four dogs and I couldn't live without one. As long as the yard is enclosed safely, it would be the best solution. If you rent, you might be able to replace the door with something relatively inexpensive so you can take it with you when you move. If you own, it's a worthwhile investment.

A door for a dog the size of yours will cost about 90 bucks. Unless you have an unusual door, you should be able to put it in yourself in about an hour---or if you're as klutzy as I am, two hours.