I got some in the mail for free. My kitties turned up their noses at them so I thought I would give them to my sis for her kitty but then I heard they have made some kitties sick. I also heard some kitties love them and eat them up with no problems. Now I don't know what to think.

Wasn't it the Diamond cat food that killed some cats? Never heard of Greenies being bad. Does anyone in here had experience with Greenies? Suppose to be good for tartar build up on the teeth.