Put a flea collar on dog 1 person broke out in burning and itching on face ended up leaving chapped skin other burning on face subsided after washing numerous times dog hid under bed crying shaking head constantly we took it off after it started burning us from putting it on dog took at least 3 day's after bathing dog to calm him down and took 3 to di nit use they need to take off the market4 days to stop feeling itchy on us User's recommendation: Don't buy company saud it wasn't from the flea collar!!!! Really it started after we out collar on they need to take it off the markey.