i bought this flea control shampoo for one of my rescued kitties.
It is called Zodiac FleaTrol protein conditioning shampoo.
According to the bottle, it was "tested, trusted, effective." It kills adult fleas, lice & ticks on contact. Also, it prevents flea eggs from hatching for 28 days.
It helps to sooth sensitive skin, and contains an insect growth regulator - kill flea eggs and has a baby fresh scent.
Their website is www.zodiacpet.com.
Also, once i inquired about flea control at Petco. The store manager told me that there are three main areas to concentrate on: outside the house, inside the house and on the pet.
Outside the house : water plants with a flea control product.
Inside the house : spray the areas where your pets frequent with a flea control product.
On the pet: Some flea control product. i used Advantage once and it really worked. What Mary Anne said makes sense about rotating the products.
There are products that you can buy from Petco or pet supplies store for such purposes.
Don't know how much this helps, but thought i would share.
Smiles and cheers!