This database is provided as a free service to the Bullmastiff community intended to help Bullmastiff Breeders make more informed breeding choices and for all to verify the lineage of their Bullmastiffs.

Wrights Inbreeding Coefficient: The Wrights Inbreeding Coefficient is a measure of the degree of genetic concentration within a breeding line. Tight line breeding generally increases the predictability and uniformity of qualities, faults, and health of the proposed litter. The inbreeding coefficient is not available within this database. I will be happy to provide whatever statistics are available in my personal database on request. E-mail lee@bullmastiff-1.com providing the full registered name of the proposed sire and dam, or the individual bullmastiff, and I will return the inbreeding coefficient of each of them, and the proposed litter as well as the percentage of influence of each ancestor within ten generations as available.

Database Updates: The online database contains 20,667 Bullmastiff entries. My personal database currently contains over 20,667 entries and will replace the online database as time and motivation dictate. To add a Bullmastiff, an ancestor, or to correct errors please submit this form. Please verify your information before submitting the form. Proper verification is the actual AKC registration, an AKC Certified Pedigree, or searching the AKC database at http://www.akc.org/store/ . Do not depend on the accuracy of show catalogs, OFA database, or your breeders memory.

Waters Bullmastiffs