Thanks guys,

Pam, Bud had his knee re-built(complete with pin) &
had the ligaments re-tied around the kneecap to keep
it in place. His running days are long past. He can do
a pretty fast paced trot. That's what's freaking me out.
Bud's surgery was July 31, 2001. If it's an infection around
the surgery site, wouldn't it have shown up sooner? And
if it's the popped kneecap, that means a ligament might
have torn again. The only saving thing is he does not
seem to be in any pain and is able to walk around just fine.