Having a dog and being a breeder are too different things.
If you don't know anything about breeding don't do it.
Dogs should be more then just registered purebreds before being bred.
They should be shown to prove they are worthy of being bred.Plus every breed has health problems.
Do you have American Staffordshire Terrier or Staffordshire Terrier?
Staffy Bulls are being tested for hip,elbows,eyes,heart,patella,and some even bear hearing test.
Am.Staffs are being tested for pretty much the same things with the Thyriod being also tested.
I you just at least tested and certified the hips it would be a start.
Some people are OFA'ing the dogs hips and some are penn hiping the dogs.
This is the OFA site.This shows the certifications
http://www.offa.org/samplecerts.html#hiprpt
You might say well I'm only breeding pets .Everyone who buys a dog deserves to know that it is a healthy puppy inside and out.
One should only be breeding to improve the breed not just have puppies.