“So far Seresto flea collars have worked well for my dog. I appreciate that I can buy with confidence from Allivet, at a good price. I use to buy Seresto collars on Amazon and always had good luck, but it has become risky to do so, because you could end up with a counterfeit! Since Allivet is a reputable company, I assume they buy directly from Bayer, or a reputable supplier...”
