They've all recently been. Jake vomitted one night and there were creepy crawlies in his vomit. We knew he had worms, and made an appointment immediately with the vet. They all went in and got checked over, and then got treatment. And then they all went back for a follow-up and another dose of the de-worming medicine. I don't think Jill is sick - I think she's just being a Queen-be little Miss Priss and refusing to go in the litterbox.