Fleas can be a nightmare for any dog, but are of particular concern for puppies, because of these parasites set to feasting on a tiny puppy’s blood, the infestation can lead to severe anemia or even death much quicker than a healthy adult dog. Fleas also can transmit other parasites like tapeworms. Preventative care is the key to keeping fleas away from your pup. Flea medication that comes in oral, topical or other forms is an important defense (but should never be administered before a puppy is at least 6 weeks old), as are regular spot checks and regular grooming. Even citrus fruits have been known to keep fleas at bay. Read our guide to fleas for more tips.