We built a large dog house with a wood stove, windows and a dog door. We use fake grass mats to instigate the puppies thinking about where they use the bathroom. As soon as they are able we show them how to use the dog door. Most of them go outside on their own to go potty. We feed their mother a lot of meat and puppy chow every day to give her the sustenance to feed her pups. We clean their house every day and love them tenderly.