For a while now, we've been having a problem with one or both of the cats peeing outside the litterbox. I called the vet, who said it was most likely a behavioral issue, so we didn't bring them in. It seemed to get a little worse though, so we took them both in to get tested.
Turns out Q*Bert had a urinary tract infection, poor thing. We gave him a week's worth of antibiotics, and this morning I took him back to the vet for a followup to see if he's better.
Now, I'm sure most of you reading this have had to give a urine sample at the doctor's at one time or another. No big deal. But you can't ask a cat to pee in a cup--so they extract it straight out of the bladder. Ugh. Unfortunately, Q*Bert didn't have anything in his this morning, so I had to leave him there. I'm actually more worried about Max--last time I took Q*Bert to the vet and left him alone, he freaked out a bit.
We haven't noticed any peeing outside the box since we finished the antibiotics, so we're crossing our fingers. However, the vet said even if this solved the medical issue, behavioral patterns may still have been established, and they're tough to break. The vet I saw this morning said this infection is very rare--usually when cats are peeing outside the box, it's behavioral, not medical.
Poor kitty!