"Greenies" is (are??) a very controversial product. Some vets we know think they're great, since they help remove tartar from your poochie's teeth. To do that, however, the doggie must chew the treat and play with it, rather than soften it for a moment and then swallow it nearly whole, as our cairn terrier does. The "treat" can then become a serious stomach or intestinal obstruction. Because of that, a couple of our vet buddies and our dog behaviorist are adamant that the product should not be used for those dogs who like to swallow treats almost whole. Much as our two dogs love Greenies, the little green things are off the treat menu in our house because we are not inclined to set Katyusha, the cairn, up for abdominal surgery to remove the undigested treats. I've tried to show her how to eat more delicately and not just gulp her grub down; but she insists on doing it the old-fashioned terrier way. (Of course, she may have gotten that whole idea from watching her two dads inhale their food on many occasions - hmm, gluttony must run in the family...)