i went to a pet store and they gave me a free sample of iams tartar treats. they look just like greenies, but with a brush on each end. they offered it to me after i declined a greenie sample because of the recent media coverage about blockages. i told her we had a bag of greenies at home and once they were finished - no more for us. she said the iams were better. i gave it to romeo supervised and he really likes it. it's so similiar to the greenie texture it must be dangerous too. does anyone know about these? are they a danger too???