Bearhill Mastiffs
Bearhill Mastiffs is located in Cedar Grove, in the state of New Jersey. Home to numerous champion dogs, this kennel will assure you top quality dogs and puppies for this breed.
http://www.bearhillmastiffs.com/

Introducing... Celtic's Mastiffs
Celtic Mastiffs is glad to present you its unique specimens which are the result of years of hard work and undivided devotion to this breed. Many of these dogs have achieved important prizes and awards.
http://datres.com/mastiffs/

Mastiffs of Dawn Edge.
Dawn Edge Mastiffs offers you outstanding dogs that will excel at every task you may put them to. They are all properly health tested in order to assure you top quality and safety.
http://ourworld.compuserve.com/homepages/dawnedge/

Lexington Mastiffs -- Appreciating and Preserving the Mastiff: Type, Temperament, Soundness and Long
Established in the year of 1996, Lexington Mastiffs strives to produce high quality Mastiff dogs that can be perfect pets as well as competitors. They are all bred following strict AKC standards.
http://www.lexingtonmastiffs.com/

Stronghold Mastiffs
With almost twenty years of experience related to Mastiff dogs, Stronghold Mastiffs is nowadays a marvelous kennel in which these dogs are welcomed and raised with tons of love and care. Puppies are available.
http://members.aol.com/strnghldms/