The best flea shampoos for dogs kill and prevent these parasites. ... like Capstar, an oral flea treatment that targets adult fleas and is safe for puppies as young as 4 weeks old.

Cat flea medicine. The pill nitenpyram (Capstar) ... There are different kinds, including shampoos, sprays, powders, and meds that you put on your cat's skin or they take by mouth.

Capstar is our top pick for the best flea and tick protection for puppies as young as 4 weeks old. This OTC oral flea medication starts killing fleas quickly. ... When using flea shampoo, ...

Best for young puppies: Capstar for Dogs - See at Chewy. Best collar: Seresto Flea and Tick Collar for Dogs - See at Chewy. Best shampoo: Adams Plus Flea and Tick Shampoo with Precor - See at Chewy.