Barrier Bites Flea & Tick Chews for Dogs Only Natural Pet EasyDefense Barrier Bites use brewer's yeast and garlic to protect your dog against fleas & ticks. These bacon flavored flea & tick chews for dogs also feature amino acids, essential fatty acids, and complex b-vitamins to maintain a healthy skin & coat, immune system, and GI tract. Only Natural Pet EasyDefense Barrier Bites are a holistically formulated flea & tick chew for dogs that offers daily protection in supplement form. Protect from the inside out against fleas, ticks and other biting insects. Discover the benefit of this flea & tick soft chew supplement today!