I have worked at a vet clinic for many years, and have always known that Hartz & Seargeants products were dangerous, but recently have seen some unmistakable incidents that were directly related to these products. In the first instance, a cat was brought in from having seizures all night. The connection was made that all the owner did was bath her dog in Hartz flea & tick shampoo the day before. The cat’s contact with the dog was enough to send the kitty into seizures for several hours, luckily he pulled through, but just barely. Another incident involved a dog whose legs were so raw and irritated that she could barely walk on 2 of them, again, the culprit was found to be the Flea and Tick Shampoo… This is dangerous stuff, people! Please do not use any of these products on your pet. It may cost a little more to get the stuff from your vet, but it’s better than throwing your money away on products that don’t work, and you will have the peace of mind that your furbabies are using a safe product. That alone to me, is worth any cost!