I am so glad I found this article. My 3 month old tabby kitten, Kurt, has always had a bad problem with fleas. I’ve been using Gold’s shampoo on him but I recently picked up Hartz flea and tick spray for him. I’ve used it on him once with no ill effects but you can bet I will NEVER use it on him again after reading these stories. I’m going to throw away my bottle and home and warn my roomate not to use it on the stray she’s planning on adopting either. Thank you so much for the warning!