On Monday, August 23rd we gave our Border Collie Max his first dose of the Hartz Advance Care Flea and Tick Drops. He is 8 months and 33 pounds. He had a reaction within 10 minutes! His symptoms were, drunken-like walking, vomiting, foaming at the mouth, and partial paralysis. We rushed him to the vet and he was given two injections to calm the reaction. We gave him a bath immedeately upon his reaction and one with mild dish detergent when we got home. He has become dehydrated and is still a little gloomy 48 hours later. He recieved a shot for nausea today as well as subcutaneous fluids for his dehydration. He is expected to make a full recovery but that was uncertain at first. I called Hartz today and filed a complaint and they also transferred me to the Poison Control Center (I thought) to file a complaint. I spoke to a vet that told me that his symptoms were impossible in relation to this product based on the info in their database. I told him, there is a first time for everything!! He is with the Animal Product Safety Service, a division of the ASPCA and Animal Poison Control Service. When I got on the internet this afternoon to do research on this I was appauled to find all the horrible info on this product. I thought this was a brand to trust!