The Colby dogs are an ancient black-nosed bloodline that served as one of the pillars of the APBT breed. Considered one of the most important and one of the most famous bloodlines the Colby dogs were started by John Pritchard Colby in 1889, who acquired the best fighting dogs (bull and terriers) imported from Ireland and England. One of the most famous dogs of his bloodline was Colby's Pincher. Pincher was known as an invincible fighting dog and was widely used as a stud dog. For this reason Pincher is present in the pedigree of the vast majority of APBT specimens. Today, the Colby dogs bloodline remains preserved by the family of John P. Colby.