Weevil went in to the vet's this morning. Carrie and I had noticed him spending a lot of time going from litter box to litter box without actually seeing him produce anything. He didn't do anything for the vet either. They said he might have a bacterial infection and gave us some medicine. In the meantime, he's sequestered with his own litter box so we can try and obtain a sample and turn it in to the vet's tomorrow.
It's a little disconcerting for me so soon after the loss of my Selena. With her gone, Weevil is now our oldest at about 13 years old.