I split one tube of Hartz pro flea drops between my two cats on the evening of 09/28/17. The next day my mama cat greeted me when I returned home about 2 pm shivering and her eyes out of control. I realized she was seizing and took her right to the vet. There I was informed it was from the flea drops. I am waiting this am 09/30 to see if she will live or die. I came back home to look for my other cat to find he had died and flies were gathering. I am heartbroken.