I've never had this sort of problem before.
Last Sunday, after walking from the car to the apartment of a friend, Sunna went in, turned around and squatted. No sniffing, no warning. The friend doesn't have any animal and the apartment has a brand new rug.
My first thought was UTI. However, she has no problem at home, even when kept from going outside for a time. She also doesn't have any problem in the car.
In my mother's house, she urinated while I was opening the back door for her. I didn't even realize it until I turned around. In this case, I had made sure she went before we drove the three blocks.
Today, she had to stay in the car while I visited my friend.
If I were having problems in the car or at home, I would suspect a medical problem. Aaack! I hope this isn't one. Thor couldn't control his bowels, but he was an equal-opportunity dropper. The first several times he didn't use the outdoors was in other people's houses. But he was a lot older when he got degenerative myelopathy. Cannot see vet until the weekday anyway, so maybe someone can come up with some behavioral solution.
kjd