I have been giving my cats Greenies for a few years now. They LOVE them. They will sit by the jar where I store them and meow plaintively until I leave the kitchen (or on occasion, indulge them!). I highly recommend these to any cat family. One thing, though: make sure you either store them in a locking jar or store them away in a cabinet, as cats can (and will) "break into" the packages they come in!