I am SO glad that I found your site….thanks so much, you saved my cat from death. On Thursday evening, I gave all of my animals their flea drop medicine. I always use advantage, but about a month ago, a friend lost his beloved pet and donated the leftover food and flea medicine to me. One item was a single sample of Hartz flea drops specifically for adult cats. I decided I might as well use it up and poor Kitty was the unlucky recipient. I did notice as soon as I administered it, she was immediately upset and ran outside. I figured she was just annoyed at me for giving her the medicine and didn`t think much of it as both of my cats are indoor – outdoor cats and are free to come and go as they please. I didn`t see Kitty again until she came in the next afternoon. I immediately noticed some very odd behavior. She was twitching and jerking uncontrollably and seemed to be having a seizure or spasms. She immediately went for her food and water, but the uncontollable jerking made it very difficult for her to eat and drink. I picked her up and tried to soothe her and only then noticed how bad off she was. The jitters she had were so strong, it was difficult to hold onto her. And she kept opening and closing her mouth like she wanted to scream, but no sound came out. Neither of the other animals were having this type of reaction at all, so I immediately went online and searched for reactions to the Hartz flea drops and found your site. I immediately bathed Kitty using dish detergent, and slept with her that night to try to soothe her jitters. The next morning, she seemed better, but still was shaking involuntarily. She was able to eat and drink. Again, I gave her another bath with dish detergent and carefully dried her off. She slept most of the day, but today when she got up, she was like her old self. No jitters, very happy, purring and eating and drinking normally. I am hoping that the baths have gotten rid of the poison that is so obviously in Hartz flea drops. I will continue to monitor her closely, but believe she is on the path to complete recovery. Thank you so much for your information and for creating this web site. I fully believe it saved my cat`s life.