Bests & Worsts Reviews from Amazon

10 days after placing the Seresto collar on my dog, she suffered a neurological problem diagnosed as meningitis of “unknown origin”. She temporarily lost the use of her hind legs and vet bills have already exceeded $5,000. Insecticides in the Seresto collar are nerve toxins which Bayer said cannot enter the animal’s blood stream from the collar. However, these toxins have affected the nervous systems of rats in scientific studies. Our dog was scratching and biting herself after the collar was on, and before the toxic episode she was groomed with the collar on. Our cat, on the other hand, is doing well with her Seresto flea collar. If your dog is sensitive to medications, consider not using either this collar or other flea medications that contain insecticides. They are not regulated (yet) by the Federal Drug Administration, and there have been thousands of complaints from pet owners to the Environmental Protection Agency. Some flea collars have been taken off the market due to concerns about insecticides affecting children and entering the water system.