My wife and I have two small rat terriers. We noticed fleas and purchased many of the Hartz products to help our animals. We used two bottles of the flea spray for our apartment. We used the foggers and vacuumed the entire place (moving everything to vacuum) once or twice a week for four weeks. We also used the Hartz shampoo and the drops for our dogs with all of the treatments to our apartment. We are clean people and made sure we washed the dogs bedding every few days. After about 2 months, the dogs still have fleas. My only response is that Hartz flea products are completely useless and a joke. Don’t waste your time and money.