Most people have probably seen some type of hartz products on the shelves at their grocery stores, and seen that it's not very expensive. Anything that claims to kill and repel fleas and ticks and is affordable is worth trying because a lot of products are very expensive and even those don't work good half the time. I tried hartz shampoo on my dog and cats who had fleas and it didn't kill very many fleas. There was fleas floating in the water and dead fleas throughout their hair but a large number of fleas were on my animals and appeared to be hanging on for dear life. The fleas that are holding on look dead but as the pet dries those fleas resume business as usual. I even left the shampoo on way longer then what they recommend. I also tried to get the hanger ons with a flea comb but it wasn't happening. I recommend not using this shampoo for flea control. It probably won't work and it is a waste of money for the sole purpose of killing fleas.