I think we're out of the woods this time FINALLY! The Big Boy's tail is waving at full-plume again; in fact this evening he's bounding around the apartment, chirping, meowing and pestering Mitzi :-) He still hasn't pooped (3 days), but I know the Amoxy tends to constipate him so I'm not too worried. He is eating, drinking and peeing normally and is out of pain.

I will take him by the vet's office to have him weighed this Saturday (they're half a block away from me), as I still don't beileve he's only 9 lbs. Thanks everyone for the positive thoughts and prayers.