I forgot to mention something in the post about saddle thrombus. When Quentin returned home from seeing our vet, Rebel saw that Quentin was having a hard time trying to jump onto the arm of the sofa, managing to jump up only high enough to hang on with his front paws. Quentin kept trying and trying. Finally, Rebel walked over to Quentin, who was hanging onto the sofa arm by his front paws, deciding to give the cat a push up with his head. I wish I could have videotaped that; it is a moment in time I shall never forget: my dog giving my cat a hand, so to speak.