Join Date: May 2011
Location: Northern California
Flea/tick shampoo will only kill the bugs that are on the dog at that moment. It has no resdiual protection. So if you're going to be in a flea and tick-infested area, you probably would have the best protection using a spot-on product like Frontline.
As for flea shampoo, any shampoo will do as long as you leave the dog sudsed up in it for at least 15 minutes. Heck, even dishsoap will work in a pinch, though it can be drying so I don't recommend it for frequent use. Earthbath makes some nice shampoos and is readily available at most pet supply or feed stores.
A shampoo with pyrethrin, permethrin (or anyting ending in -ethrin), d-limonene, or neem will kill the fleas a lot more quickly--just a 5 minute soak should do the trick with those. Technically, shampoo can only be labeled as "flea shampoo" if it contains an insecticide. So anything else will need to sit on the dog for 15 minutes or more.