Bizarre coincidence filter: I was on the phone with the vet's office (which is a rare event), when Cosa's vet called with her autopsy report.→[More:]

Turns out poor little Cosa had lung cancer. Her right lung never fully developed (which no one had ever figured out, even though I took her to the vet numerous times early in her life because of what sounded like asthma), and her left lung was filled with masses. The cancer was causing the clots that made her lose function in her back legs. She had two more fairly large clots in her heart.

I knew at the time that putting her down was the right decision, but now I have confirmation. Hi little Cosa, wherever you are. Here's another belly rub for you.

And on a less downer of a note: The kittens are getting flea baths tonight. Should be big fun. Revenge is mine!