I used a flea collar on my dog and it gave him what looked ... Protect your pet! Avoid HARTZ brand! The attached picture is the only one he would let me take. He won't let me mess with the sores ...

How do I know I can trust these reviews about Hartz Mountain Flea & Tick Drops? How do I know I ... I used a flea collar on my dog and it gave him what looked like large hives and a skin reaction.

as well as flea collars like Hartz UltraGuard Flea & Tick Collar for Cats and ProElobara Flea & Tick Collar for Dogs. Consult with your veterinarian to discuss the best options for your companion.