My niece had just adopted two kittens from the Humane Society. She quickly realized they had come with fleas. She is so allergic she did not want to get chemicals from the vet. She called me immediatly at my health food store to see if I had anything that would work. We carried an enzymed based Pet Wash from Safe Solutions Inc. She said that as soon as they applied the peppermint shampoo to the kittens the fleas were jumping off the kittens, you could see them all over the bath tub. So she just washed them down the drain. No more fleas.