Last summer I used Hartz shampoo on my shih tzu. That very day she began having seizures. After several medications the seizures stopped. Her health however continued to decline. The hair on her back turned black and started falling out. She had some small lumps in her neck. Earlier this week she started not eating. Her skin began to turn yellow and the lumps in her neck had gotten larger. After a ton of blood work at the vet it was determined she had lymphoma. They recommended we put her to sleep. She was 3 years old. Hartz took the life of a healthy 3 year old dog. Please never use it on your fur babies.