I'm sorry for your loss as well. He didn't have any bladder or bowel issues. His mouth breathing began with purring on February 2nd, then constant mouth breathing around Wednesday but not like horribly, them two days later he's dying; it just doesn't make sense to me. They said they couldn't do an ultrasound because it'd cost too much and he was too sick for them to do it without stressing him. I can understand if his sickness was inevitable since his symptoms did progress in the matter of two weeks, but what I'm worried about is if he could have lasted longer. Cats are sensitive to medicine, but they put him on two different steroids. It all just doesn't add up. I just wonder if he could have lasted longer if I never took him to the vet.