America's Most Wanted Bulls

There are generally considered to be three types of American Bulldog:

the Bully or Classic type (also referred to as the Johnson type)
the Standard or Performance type (also called the Scott type)
and the Hybrid type

These types are named after the breeders who where influential in developing them: John D. Johnson and Allen Scott.

The Bully type is a compact sturdy dog, with pendulous lips, an underslung jawline, a short muzzle and facial wrinkles.

In contrast to the Johnson type, the Standard type is large and leggy and has a muscular bearing. Physically these dogs have a longer muzzle and an underbite.

Possibly the most common type of American Bulldog breed in existence today, the hybrid type is believed to be a cross between the Scott and the Johnson types. It thus inherits the best of both the breeds.

Different breed registries have different breed standards. These organizations include: ABRA, ABA, ABNA, EABC, NKC ... Their websites are very informative, so you may visit them if you want additional information.