This article is from the Mastiffs Breed FAQ, by mmcbee@access.mountain.net (Mike McBee) with numerous contributions by others.
Well, Mastiffs aren't bred for tracking, so they don't all
have the best scent discrimination. Oh, you mean smell as in
having B.O.?
Mastiffs need occasional bathing, but since they have a short
coat, they dry fairly fast. If a Mastiff has a bad odor
despite regular bathing with a good dog shampoo approved by
your breeder or vet, it may have a medical problem such as
fungus in the ears or between the toes, or a digestive or
dental problem, which can cause bad breath. Hypothyroid dogs
tend to have B.O., and infected anal glands can cause a
serious stench. Time to go to the vet to check it out.
 
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