Rocket got a biscuit from the teller the other day. He thought that was wonderful. :) He was being a good boy at the time, and she happened to see his head silhouetted in the car window.

I don't know if your pet-sitting clients left you any money for essentials, but Raid Flea Spray is pretty good stuff and doesn't stink up the house. When the cats got fleas a few years ago, I pulled the cushions off the sofas, vacuumed them and sprayed them good all over with the Raid. Between that and the stuff from the vet, the little bloodsuckers disappeared fairly quickly.