Hello!
I have a 10 mo. old who did great during the day. She sleeps in a crate at night-and she would pee in her bed. I would have to put clean bedding in it every morn. I started to get her up about midnight and take her out. I think she is just such a heavy sleeper-and still young,she just didn't wake up when she had to go. Sometimes she will still have an "accident" during the night,if I sleep through and don't take her out-but she is getting better about it. I know she didn't have a uti, as she was fine during the day. Have you tried getting her up during night to go out? She may be a heavy sleeper, too?! Other members may have suggestions..........