Why is my 10 month old potty trained Pomeranian unexpectedly peeing all over my house for the past two months?

My 10 month old Pomeranian named Allie has been potty trained for many months. We worked really hard with her right from the start on crate training her. It didn't take her long to catch on and was potty trained quickly. She went several months with no accidents and would always go to the door when she had to go. Then two months ago she started to back track. We would take her out, she wouldn't go, then we brought her back in and she would squat and pee as we take the leash off. Now its a random thing. Sometimes she runs to the door and goes immediately, other times she will not even go near the door and pee in the house. Its like she chooses when she goes outside. Lots of times we bring her in and she pees the minute she comes in. Any advise on why she would be doing this and what I can do to get her back on track? Hoping someone will have an idea cause I have tried everything I can think of and nothing is working. She was potty trained and now she like pretends she isn't. Please help

Asked by Allie on Oct 22nd 2009 in House Soiling