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 American Mastiffs are a blend of different Mastiff breeds, which give them  an excellent temperament - good with children, loving, very protective and devoted  with a sweet disposition.
 
 Pound for  pound, the American Mastiff is one of the strongest mastiffs - strength  blended with gentleness. The American Mastiff is also exceptionally intelligent  and will accept authority. They are more athletic than other Mastiffs, have a  stealth appearance and a gait like a panther.
 
 Training can begin as early as eight weeks. They grow upward until  two years of age, and fill out from two years  to four years, finally reaching adulthood, although they act like puppies for  life.  Mastiffs are a primitive breed,  and the American Mastiff is one of the rarest of all Mastiffs.
 The American Mastiff Size:Male:  large 100-140 lbs
 Female:  80-110 lbs
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