Levi appears to be completely well again.  He LOVES the Hill's S/D (so
does Rudy), he's peeing normally, and he's back to his evil ways.  He
gets re-checked in about 2 weeks, so I can't be sure, but if behavior is
any indication, my little mischief maker is doing just fine.  :-)

As an aside, I had a contractor here on Friday and decided to curl up
with all the animals for a nap since I had them locked in my room.  My
puppy got really scared when the air compressor went off a few times.
Rudy, my older cat, got up from his nap, curled up right next to the
puppy who then put his head on Rudy like a pillow and everyone went back
to sleep.  Rudy loves that pup, it's really cute.  I wish I'd had a
camera handy!