Thanks for all the prayers! Stewie's been taking his pills like a champ, but we're still not 100% sure he's ok. Today we came downstairs to find him semi-squatting right in front of the litterbox. He wasn't peeing, but looked like he was trying. And then later he went in the box & didn't do anything. He still isn't making any noises like he's in pain...but we're still keeping a close eye on him. If after a couple more days of the Albon and he's still acting odd, back to the vet he'll go.