I have my Chihuahua pee on wee wee pads in the house. I plan on getting a doggy door very soon so she can go outside to do her thing when I am home. My neighbor told me about this today. He lets his pup out thru the doggy door only when he is home. When he is working, the dog stays inside with the wee wee pads. Our dogs are small and we live in townhouses. I would not let my chihuahua out during the day when I am at work, because I am afraid someone will steel her. She goes on the grass when I walk her. She does pretty good in house and outdoor training.