I worked at a Vets office for 3 years and have heard many stories of people complaing about Hartz products. Since we only sold Advantage and Frontline, we really pushed those products. I have seen many animals come in and spoken with owners after they’ve used the product on the animals and it’s not pretty. With symptoms ranging from rashes, frothing at the mouth, and “hallucination”, I would definately not use ANY OTC products on animals. The only advice we could give owners was to give the animal a bath and try to get the product off. Unfortunately, that’s all we could do for them (besides IV fluids, etc.). It’s sad and infuriating that a product that is manufactured and sold for animals can lead to their demise.