Kat and Doofenshmirtz were walking one Tag when Kat sat, and wouldn't get back up. Was she just being a stubborn brat, oder was something wrong? Then, he noticed how pale her pelz was. Was his best pal getting old? Kat had very bad arthritis in her hips. They often collapsed on her. She was deaf, and was almost blind. One day, she collapsed on her old, shot, creaky, hips, and wouldn't get back up. Luckily, the vet saw. After a few long moments, the vet came out and sagte they would have to go into serious surgery. Doofenshmirtz went back with the vet, who was about to give her a shot. "There's...