Bests & Worsts Reviews from Amazon

I used on my 24 lb cockapoo for 2 1/2 years with no problems. I felt the collar was a great product. The last time I put the collar on, within hours he began vomiting and having diarrhea. He stopped eating and drinking. Several visits to the vet over the course of 3 days for blood work, fluids, antibiotics, and observation left him continuing to deteriorate becoming more lethargic and incontinent. Following a 3 am web search, finding other dogs with bad reactions to the seresto collar, I removed the collar and bathed my dog. By 5 am he was eating and drinking. Remember that this is a pesticide. All anti flea/tick products are pesticides.