I used Sergeants Gold Flea & Tick squeeze on for dogs, and my 7 year old Chihuahua, Pinky, had a bad allergic reaction. It started about 1.5-2 hours after application. She started scratching at her face, then about 20 minutes later, she couldn't even sit still, and she was breathing very heavily. So, I rinsed her off, but she was still throwing herself on the gound and itching like crazy. So I called the number on the back of the Sergeants box, the lasy I spoke with said that the product had just irritated my Pinky's skin, and that it was nothing that could harm her organs or anything. She told me to wash her with Dawn and then apply vitamin E oil to her back. After doing all of the above, Pinky was still very itch and couldn't even sit still for a couple of seconds. So I took her to the Emergency vet, he told us she had an allergic reaction to the Sergeants, and that she was very lucky because it could have been a whole lot worse. He gave he 2 injections, a steroid and an antihistamine. He told us that Pinky would be very uncomfortable through the night, and she was. I felt so bad for her, she couldn't sleep. She kept moving and moving and trying to stop the itching. Now her little eyes are swollen. I HATE SERGEANTS! Their products should be pulled off the market!!!!!