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    Think you've got your pup all figured out? Not so fast, if you believe any of these nine common myths about dogs.

    Myth No. 1: A warm, dry nose signals a fever.

    The temperature and moistness of your dog's nose has nothing to do with his health, says veterinarian Suzanne Hunter, DVM.

    The only way to know if he has a fever is to take his temperature (usually with a rectal thermometer). It should be 100-102.5 degrees.

    A better way to tell if your dog is sick is if he's not as hungry or active as usual.

    Other signs of illness:

    • Vomiting and diarrhea
    • Urinating more or less often than normal
    • Coughing and sneezing
    • Discharge from eyes, ears, or nose

    Myth No. 2: A dog's mouth is clean and sterile.

    Not even close. Just think about where that mouth has been.

    Most dogs "are willing to lick their own and other dogs' nether regions, steal cat feces from the litter box for a late night treat, and eat anything they can find on the ground," says veterinarian Julaine Hunter, DVM.

    Myth No. 3: Raw meat is the best diet for dogs.

    This may sound good in theory. But the reality is it's an unbalanced diet that can also be dangerous.

    A raw-meat diet can leave dogs short on calcium and other nutrients, says Tina Wismer, DVM.

    Raw meat is also risky because it can carry harmful bacteria, disease, and parasites.

    Myth No. 4: Dogs can't digest grains.

    "Contrary to popular belief, dogs' digestive systems are quite robust," says Hunter.

    Corn, rice, and beets aren't just filler. They enhance a dog's diet with essential nutrients and protein when pre-cooked, which is typically the case with commercially-prepared dog foods.

    "Dogs are omnivores and grains are a healthy part of their diet," Wismer says.

    Myth No. 5: You should feed your dog according to the label instructions.

    The label is just a starting point.

    "An extremely active dog or one with a high metabolism may require more. A less active dog would need less food to avoid becoming overweight," says Mary Jo Wagner, attending veterinarian at Argosy University in Eagan, Minn.

    Ask your vet what's right for your dog. If your dog is at a healthy body weight, you should be able to feel his ribs easily beneath the skin.