Flea medication is an important part of your pets health because it prevents your animals from getting attacked by fleas along with catching any illnesses that can be passed thru fleas. It also prevents fleas getting into your house and attacking you as well. It is important to give flea medication to all animals, not just inside animals because any animals that go outside can bring fleas into the house and spread it to the animal that doesn’t have the medication that will kill them. The best kind of medication is the collar or the liquid medication that you put right in between the shoulder blades so that the animal will not lick it off.