Thank you, Tubby and Peanut's and Cracker Jack's Mom, for your kind wishes. Yes, I did call my Bill's regular vet on Monday and got some great advice. The vet tech there actually fostered and socialized Bill and has a great fondness for him. Bill is getting better and better, and purrs again when we pet him and arches up into our hands to meet our pets. Bless him, I thought I was going to lose him there for a while!