Prego and Polly smell nice, I don't know how to describe it other than nice. There is this one tech at my vet's office that always smells Polly and says how nice she smells. I don't put anything special on them, so I guess they just pick up the smell of the house. Scot likes to burn incense and has a scenter thing on our furnace filter, but that doesn't seem to be quite what they smell like.