There are plenty of great shampoos out there, but there isn't just one best flea shampoo for cats considering that each cat is different! (happypetsnow.com)
But what is the best flea shampoo for cats? (geekwrapped.com)
Lambert Kay Flea and Tick Shampoo is so effective and gentle, it's great for adult cats and the best flea shampoo for kittens over 12 weeks old. (geekwrapped.com)