Bests & Worsts Reviews from Amazon

WARNING - This collar is extremely toxic to some cats. My cat stopped eating, and by the time I realized it was the collar's fault she had already started liver failure. We are force feeding her to get her back up to snuff. The packaging warns about dermatitis issues, but not at all about the potential for toxins to cause your cat to stop eating. Cats cannot go without eating for long periods of time. Watch your cat VERY CAREFULLY after applying this collar and remove it if you see any signs of odd behavior - lethargy, decreased appetite, etc. It may take her days to recover after removal, so watch CAREFULLY.