Review on 🐱 Hartz UltraGuard Plus Water Resistant Flea & Tick Collar for Cats - 7 Month Protection (3270094268) by Melissa Gonzalez

My roommate is a veterinary assistant and he checked the box after we put it on to see what ingredients were used as he knew which ones were starting to be ineffective. It turns out this particular brand uses something that isn't safe for humans and in turn probably isn't the best for kittens/puppies. Luckily we didn't activate the collar properly and there was no damage, but don't make the same mistake I almost made.