Our black dog's ears were forever getting fly bites, and no matter what we used we couldn't get rid of the flies landing on them. Our dogs are scared of spray bottles so we were elated to find a fly repellent that came as an ointment. If has worked so well that all of the scabs on our dogs ears have cleared up over the past month and, with a repeat slathering, we have not seen any flies land on his ears since!