The Oster Rapid Bathing System uses extremely highly concentrated shampoo. The chemical ingredient in common flea and tick shampoo should not be that concentrated and so for safety, we do not offer a flea and tick shampoo for use with the device. However, flea and tick shampoo works best on a clean animal and flea and tick shampoo should not be used for cleaning purposes. Using the Oster Rapid Bathing System quickly and safely clean the pet, the owner can then hand apply the flea and tick shampoo.