Last night at 9:00pm I put Sergents flea drops on my dog, and 4 cats. Around midnight I heard some “noises” in the hallway and thought it was the cats playing, then at 2:30 am I woke up to heraing the noise again but, then following it I heard something fall down my stairs. I got up and found my cat Kaymin laying at the bottom of the steps having a sezuire. I thought she fell down the stairs while playing and that was what caused the sezuire. I quickly got a pet carrier and put her in so she could not get hurt any further. I spent all night sitting up with her and watching over my other pets. (none of them seemed to be affected). When the rest of the family I started to retace the steps of the night before. and I was shocked that I finally put 2 and 2 toghter! I quickly told my son to do research and he comfirmed my belief about the flea drops. I quickly got her in the bath tub and washed her down 3 times top to bottom! Then I bathed all the other animals just in case. Kaymin is not having sezuires anymore at the moment but she has strange shake and shiver reaction still. She cannot sit or walk right, I think she has brain damage now. I have got her to take water by dropper and fed her some food by hand. (she wanted both) I guess that is good news. But I am still fresh into this and she may still die. I called my vet and they said I am doing all they would and it is a wait and see time. I am scared I will be putter her down. I hope I do not have to do that, If I have to take care of a brain damaged cat I will. I am just shocked that this is allowed to happen in the first place. This item should be pulled off the market! If anyone can tell me if there is anything else I can do to help my cat please reply!