Rereading these posts reminded me of one of my neighbors who is a realtor. She has a doggy door from her house into the garage so that her 3 dachsunds (Eenie, Meenie, MiniMo- I kid you not! This is how she picked them from the litter of puppies) can get to their own litter box She said when she lived in the city and had a cat, her new puppy would go in the litter box as well, mimicking the cat. I thought that was cute and would never have believed it if I did not see it myself.