How to keep curious kitten inside?

If there is a way out the house your cat will use it - you can't train a cat not to do this. This thing to do is close another door. We keep the dogs in the kitchen and shut the inside kitchen door so the cats can't get out and the dogs can't roam the rest of the house. If you have an open plan kitchen, then choose a room and shut the cat in there with litter box, food and water. Does the doggy door have a lock? If you lock it when you are in the house the dogs can bark to be let out, and you only need to lock the cat in a room when you are out or sleeping and need to leave the doggy door open.