Boca has finally blown out her other knee. 3 years ago she had knee surgery and we knew there was a 50% chance the other knee would need it. Yesterday after a short walk, she chased two squirrels in our yard and quit putting weight on her right leg :-( It's stayed that way overnight. Taking her to see the vet who did her last knee tomorrow. I'm so bummed. For her and for me. She had just started "working" as a therapy dog in my office and would get so excited when she saw me getting ready for work. And my clients were enjoying her presence too.