Mastiff puppies quickly grow into massive guard dogs and loyal, intelligent  companions.  Male adult Mastiffs can exceed 30 inches in height and 200 pounds.  Expect a considerable food bill.  Mastiffs have been used as guarddogs for many years.  However, Mastiffs have a far more gentle temperament than one might assume a dog this size would have.  Mastiffs can actually be somewhat lazy but like any dog need a regular walk.  The Mastiff's short coat only needs occasional brushing and bathing. Mastiffs are known to drool and snore and don't fare as well in warm weather.  Common Mastiff health concerns include bloat (best to provide smaller meals), hip, heart, back and eye complications.  The following videos illustrate several examples of Mastiff puppies.