“My veterinarian recommended Seresto collars as a more cost effective alternative to topical flea and tick treatments. I have three dogs, so this was appealing to me. Two of my dogs are doing fine with the collars after a few days. I had to remove one collar from one of my dogs, because she was acting lethargic and wouldn't eat - collar at this point was on less than 24 hours. Within a couple hours of removing the collar she was back to normal. I think that with any medication that sometimes this will happen. I will return to the topical medication that she has used in the past and continue the other two dogs with the Seresto.”