I don't know if it's the Periactin or if whatever was bothering his intestinal tract finally cleared, but he's definitely perking up. He's still not meowming as much as when he's 100%, but he is meowing a little bit again, and eating and drinking and peeing and pooping. I'm still very guarded about his condition and am watcfhing him like a hawk, which he doesn't appreciate. Oh well - WE know it's all for the best. Thank you for all the PT prayers. They DO work!