After I read your post I saw the one on Addison you wrote earlier. May I ask if you little guy had symptoms of pacing,walking into walls,having to go urinate a lot,listless just fell asleep in my arms when i held him,could not drink or eat just stood over the water bowl and acted like what do I do?We had our dog Murphy to vet 4 or 5 times for UTI in Dec, cleared up he acted fine then Jan 2 he had like a stoke symptoms and at vet looked better but when home slept all the time or paced in circles acted strange tail was down? Feb 1 he ate good then later he panted really bad and Mon morning he was walking into walls again ect? We waited till Wed the 4th of Feb to take back to vet and she said she never had seen anything like it to try prednisone and heart meds for a heat murmur that he did not have a week prior? But if he had brain damage it would not get better--we decided to let him go as the medication helped a week or so and the cycle began again.Now I wonder if maybe he had something like you talked about. I am going to look up Addison disease now. Sorry if I am making things more painful for you,but I know what you are going through,I cry when I see his things or when I see a dog on TV or fix a food he loved,chicken!Murphy was 11 years old Jan 28,2015. We spoiled him and loved him so much.This is so hard.Again I am so sorry for your loss.