When looking through the 32 "Pit Bull Terrier" images at Acclaim Images.com this Puppy Biting Another Puppy was a favorite.
All of their pictures are hand picked, availiable in a number of formats, and you can even get custom prints and posters.

Description:
Puppy Biting Another Puppy
A young pitbull puppy attacking his more mellow brother.

Some related terms for more images:
putbulls,  pit bull,  american staffordshire terriers,  canis familiaris,  biting,  dog breeds,  baby animal,  pit bull terrier,  baby animals,  pit bulls,  puppies,  dogs,  pit bull puppy,  pit bull puppies,  pets,  mammals,  pitbull,  canines,  canidae,  pit bull terriers,