Remington's blood count was up to 31 this morning, so--hail and hosannah--the bleeding seems to have stopped. We'll double-check it Friday and also do a chest xray to be sure that his body has resorbed most of the large quantities of fluids that were still in his chest yesterday.
He's still not super perky; at breakfast, preferred to snarl at Jake (eating on the far side of the room) than eat much food, although he scarfed the goodies that the vet techs gave him and the pizza crust I offered later. But he's wagging his tail, alert, thoughtful, in between long bouts of curling up and sleeping intensely.
He's been wanting to go out and scope out the squirrel situation today, which come to think of it he hasn't been all that interested in for a couple of weeks. Might be all the red blood cells rushing to his head.