42 of 46 people found the following review helpful
1.0 out of 5 stars
DO NOT BUY THESE - THEY COULD KILL YOUR CAT, 5 Sept. 2013
The active ingredient in these collars is Permethrin...this is highly toxic to cats and can very easily kill them. As a vet I have treated (sadly frequently unsuccessfully) cats suffering from permethrin toxicity due to owners accidentally applying a dog flea product containing permethrin to their cat. To see a cat product that contains this ingredient is deeply concerning.
DON'T TAKE THE RISK