I used Hartz ultra plus flea and tick spray on my cat in the afternoon a perfectly healthy 9 yr old tabby , by night he was wet around his mouth I thought he just took a drink by morning he was yelling loudly , saliva hanging from his mouth he jumped down walked a little flopped over and seizured then jumped up and just stared I took him outside to get fresh air he got a blood spot on his mouth and within minutes he was dead , He was my best freind , It broke my heart to see him suffer like that and to know I put that stuff on him , I will have to live with that memory NEVER NEW THE DANGERS AND I PAID THE ULTIMATE PRICE I LOST MY BEST FREIND