I purchased flea drops at a local major discount store. Within hours both my dogs were in pain. I had spot treated by putting a few drops down each dogs back from neck to tail. It was like putting a cigarette out on them. They had raw burn spots. I called animal poison control they said to bathe the dogs. I wrote a letter to the manufacturer after calling them first. I returned the unused tube with receipt. Requested full refund and compensation for a days lost work. They refunded the product and sent 2 dog bisquits saying they hoped my dogs were feeling better. NEVER AGAIN USE HARTZ OR SARGENTS.