Hartz Ultra Flea and tick spray. So, I am a doggie sitter. Today, I am charged with watching 6 of the cutest dogs ever, 2 boxers and 4 shitzues. They are infested with fleas it breaks my heart. Doggie Momma told me to spray the Hartz on them, I did. She says this is what she uses. I got it out and read the label. It sounded toxic. The dogs were already lethargic and exhibiting all the signs of a poisoning. I did not use the product, I came here first. Then I gave them flea baths with dandruff shampoo. It seemed to kill the fleas after 10 mins leaving it on. It also soothed their skin. I don’t even want to toss this poison in the trash. Why do people still trash Hartz, why are they still in business? They KILL PETS AND FLEAS. This dog may die because her doggie momma, used the Hartz product on her. She is not doing well. I am glad I did not give her another dose. This product should not be an option. Just feed your dog a bullet instead. It is faster and a more humane way to go, if you want to go for the cheap. DONT DO IT!