Hartz products have killed many pets. I honestly don't understand why they still have products on the shelves. I don't buy any of their products - don't trust them. Also, their flea and tick treatments aren't very effective. They have had the same active ingredient for so many years and most fleas are immune to it now so it doesn't work. I'd go with a product that your vet sells such as advantage, promeris, frontline, or revolution. I'd get rid of all the hartz products if I were you - dogs and cats have died because of Hartz. Oh, congrats on your new puppy
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~Magnifique Yorkies~
Purchasing from backyard breeders, pet shops, and puppymills perpetuates the suffering of other dogs.
Educate yourself and buy from reputable breeders or rescue.