We have a rescue dog from a former puppy mill. Upon rescue she was sent to a few different places (barns and such) til a foster mom took her on. We adopted her 3 months later. This was 2 years ago. She had accidents, by the many, but was getting better at the outside potty ( we have another dog), but last spring she started to pee every 20 minutes after we got home from work. She will be just fine for 6 - 8 hours, but when we get home she will leave a nickel size spot on the floor every 20 minutes if we don't take her outside. She gets along with our other dog and they are fine together, but is intimidated as our 10 year old dog is a mom's dog, too! I think she is just marking her territory - mine - mine- mine- but why now and what to do? Both dogs are mommy's babies, rescue dog has not taken to my husband though he is so kind with treats and conversation. How can we get the rescue pup to quit marking territory? We are nearly diaper territory with her when we are home from work.