Greenies Feline Greenies Review

I reveived a free sample of this stuff and my 3 cats loved it.  I purchased it several times since.  I give these to my cats for training.  Since reading the review by another writer though regarding the poisons in this product, I will not be giving them any more until I discuss this detail with their vet.  If she says it's fine, I will return to rewarding them with greenies again.  It makes them happy.