A year ago today, Boo missed the jump onto the desk. I knew something was wrong. I picked him up & put him up on the desk & he pouted. The next day I made an appointment with the Vet. Restarted his thyroid medication, but his walking was starting to have problems. He continued to deteriorate until we found the tumor on his spine. He would get around by pulling himself with his front claws & dragging his back legs. When his skin started breaking down & he was hurting, I let him go. I still miss him.