This video shows how to do cat flea treatment using a bath, flea treatment, and a flea comb. You don’t have to use a flea control shampoo–any pet shampoo will do and I recommend pet oatmeal shampoo.
Also, don’t leave a cat unattended in a crate with a toxic shampoo left in the fur since it may begin to groom itself. Just massage the cat and keep it warm during the bath time or use a non-toxic pet shampoo!