I use Frontline Plus and have been very happy with it. I also give my dogs a 1/4 teaspoon of minced garlic daily.

The Frontline Plus is a topical treatment, it comes in a small tube. You open the tube and put the liquid on the dog's skin. Part the hair on the back up near the base of the neck and apply it that. Up there, the dog can't reach and lick it. You do NOT want them to ingest it!

Frontline Plus, and other flea treatments, kill adult fleas when they bite the dog. Some treatments, and Frontline Plus is one of them, also interrupts the larvae cycle to help stop them developing.

So I use the garlic, as the dog secretes this through the skin and it acts as a repellant.

You can buy Frontline Plus at your vet, or in many pet stores. I buy it on line as it is cheaper, even with the shipping. (I have 4 dogs and now 5 with the foster pup here).

You apply this once per month.

There are some oral flea treatments (pills) but those are relatively new on the market and I don't know much good about them, lol.

There are also flea collars, I did not have good luck with those.

Whatever you do, please do NOT buy Hartz flea products, they use a pesticide which almost half of dos have a bed reaction to. A vet visit becomes critical and many dogs die from using that brand.

You will also need to use a heart worm medicine! There are 2 primary ones: Interceptor, which I use, and Heartgard. This you must get from the vet as it is a prescription medicine. There are a few online pet pharmacies which carry it, but you still need to get the prescription from your vet. These are a pill form, and you give it once per month.

I like Interceptor as it also controls hook worm, tape worm, and . . . a 3rd one, so no need to deworm in addition. Those are intestinal tract worms. The heartworm is transferred to the dog by a mosquito bite, and the worm develops in the heart.