I just wanted to thank everyone for sharing their stories, I bought Hartz Flea and Tick Drops for my 2 dogs just yesterday. I thought I’d save a little money using this product instead of Frontline. I am so incredibly thankful I followed my instincts and decided to research before actually putting it on my girls. Reading all the stories of heartbreak and tragedy was enough for me. I will be returning the product to the store today and will share what I’ve learned with everyone I know. I am a dog groomer in training, and since I am bringing dogs to my home to work on I thought I was being proactive by treating my dogs, just in case. After all I’ve read, I’d rather deal with fleas than the horrible side effects and possible fatal consequences of this terrible product. Frontline will, now, be worth every penny! Again, thanks to the creators of this site and to all the parents of the treasures we call pets, for giving me this valuable knowledge.