About 2 years ago I bought Hartz Medicated Flea dip (3 small tubes in a package) from my local Walmart. I put the first tube on my 27 pound adult Pug and 2 days later he had a hole is his neck and an open sore with missing fur at the application site. I had applied the medication between his shoulder blade son his back as directed on the packaging. I noticed that he kept scratching the area, and this he was missing a little patch of fur after the first 24 hours. I immediately called my vet and they advised me to give me a bath with oatmeal shampoo. The following morning it was oozing and liiked red because he kept scarthing the are. I took him to my vet and ended up paying to get his neck shaved, medication applied, and soft cast wrapped around his neck to keep him from scrathing. The spot didnt heal for weeks, and it took months for all his hair to gro back. They should be put out of business.