I used the shampoo on my yorkies. I HAD 4. A mother 3 yrs old, father 2 yrs old and 2 11 wk old puppies. I used the Hartz shampoo and within hours the first pup died, the mother an hr later. We washed the other pup and the father in our 2nd bathroom and just so happened to use head and shoulders bc the Hartz was in the first bathroom thinking they may have gotten into something (we never found anything that would harm them) the 2nd pup lasted until 4 am and the father yorkie is very sick. He seemed to feel better this morning so we gave him another bath (Hartz-we hadn’t seen this article yet) and now he is worse. All were lethargic, seizing, short of breath and drooling. 1st video of mother before death Wouldn’t load. 1st is puppy seizing. 2nd of healthy mother and pups.