Bull Mastiff breeders are usually far more informed and knowledgeable about their
breed than a typical pet store employee may be. 
Buying a dog from a reputable breeder is a good alternative to buying a dog from a pet store. Be sure to seek a reputable breeder; you can rest assured that the dog you get was raised with care by an informed and invested party.
There may be local Bull Mastiff clubs in your area, which can be an excellent resource for locating a breeder. There are national and sometimes regional groups and professional societies for Bull Mastiff owners and breeders. While not all Bull Mastiff breeders will belong to these groups, membership in a group like this may be an indication of how seriously the breeder takes her work. The Internet can be a good resource for locating a Bull Mastiff breeder. Ask other Bull Mastiff owners for recommendations for a breeder, or consult listservs and other websites devoted to dogs in general, or Bull Mastiffs in particular. A simple online search can be performed by typing the words “Bull Mastiff” and “breeder” into an Internet search engine. On some websites you can find forums or discussion boards regarding breeders. Try to select a breeder who has received good feedback from previous customers. Your vet may also be able to supply you with recommendations for a breeder.
Plan to take the time to get to know potential breeders. A good breeder will always have at least as many questions for you as you have for him. A breeder who cares about his animals will want to know that each dog is going to a good, loving home. You may find that you have a lot of initial contact with a breeder over the phone or via email. When you actually meet with the breeder, you may have your choice of only a few or several dogs, depending on the size of his breeding operation.
The breeding facility should be
sanitary and pleasant, with clean runs and cages. The dogs should appear well-cared for and well-fed, with ample space to run and play. When selecting a dog, look for a Bull Mastiff with clear eyes and a shiny
coat. The dogs should be active and alert. Be wary of a breeder whose dogs are overly timid or aggressive. The puppies should be well socialized and appear healthy and happy. Bull Mastiff
puppies tend to be somewhat uncoordinated, so do not be concerned if the puppies often bump one another or seem to trip over themselves.
Bull Mastiffs can be prone to cancer and hip dysplasia. Be sure your breeder screens his stock carefully, to minimize these issues.
Bull Mastiff breeders can be an excellent source of information, even if you are not yet ready to purchase a dog. A reputable breeder will spend time answering your questions, not just trying to sell you a Bull Mastiff. She will want to know that you are getting the dog you want and that her Bull Mastiff is getting a good home. A Bull Mastiff may cost a bit more from a breeder than it would from a pet store, but you will likely receive far more personalized attention and perhaps a better dog. If you don’t feel comfortable with the experience you are having, seek another breeder.
