Other than his diabetes, the vet gave him a clean bill of health after full lab workups a month ago. He doesn't seem anxious at all, he seems his happy normal self. If it wasn't for the peeing, I'd think he was completely healthy. He bathes himself, he plays with toys, he purrs all the time, his coat is soft and shiny. But his blood sugar levels are all over the place from day to day. If not for my taking readings, I wouldn't even guess that was an issue. I'm willing to try anything though. I initially thought the peeing was because he was drinking so much he couldn't hold it, but with the litter box 5' away, that doesn't seem like it would be the case. He has never had any issues in his 15 years with behavior and marking his territory. I'll read up about pheromone collars, hopefully it won't freak out the other cats.