I have a two year old female boxer amstaff mix. She has always been a great dog. I love her dearly, and would do anything to help her. About six weeks ago she started losing controll of her blader. She had always seemed to have a small bladder. When she started having accidents I knew something was up. At first I tried to tell myself it was a behavior. I never really believed this. One night she wet the bed... my bed in her sleep. I knew then we had a real issue. We woke up the next morning and went right to the vet. He tested her urine. He found nothing. He told me it was related to her spay. I was delighted. We knew what was wrong and we could make it better. We were all wrong! The pills (proin) seemed to help at first... this seems strange to me. However, they did not seem to help for long. She is back to peeing every three to four hours awake, asleep, or in her crate. She is vommiting yellow slime. She is very upset when she goes in the house, but I can not get her out in the brief window we have between urgincy and urination. She cries for maybe a minute then it comes out. Again she wet the bed... her bed and she got up and talked to the door crying still dripping. I went back to the vet. He wants to do ultra sound and xrays. I just dont know what it is or could be. I do npt get a good feeling from this guy. I just don't know if he is right.