Longevity, lifespan being approximately 13 years Although the results were promising, Pedro was not yet sure if the same results could also be achieved by using other similar kinds of breeds. Therefore, he crossed several Bull Boxers with the American Staffordshire Terrier and noticed that at least in the first generation, the characteristics remained the same. However, no more American Staffordshire Terrier crosses were made in the following generations and soon the studbook was closed to continue the breeding solely by using already existing Bull Boxers. The Brazilian Bull Boxer Club was founded in 1986 and its president is Pedro Ribeiro Dantas himself. The breed was officially accepted by the CBKC in 1999 and the today's version of the breed standard was published in 2007. Nowadays there are 2000 pure-bred dogs in the official registry of the Bull Boxer Club – however, the number also includes many dogs that have already died. There are breeders in many different states of Brazil and the breed has grown popularity since the 1990s. Although the Dogue Brasileiro is not recognized by the FCI, it does not bother Brazilian breeders and fanciers of the breed: actually, the president of the Bull Boxer Club has stated that the FCI's current principles do not meet with the breeding philosophy of the Dogue Brasileiro. Appearance The Dogue Brasileiro is a medium-sized, strong, agile and muscular dog, being massive without creating heavy or stocky impression. Males are 54 – 60 cm tall (ideal height 58 cm) and weigh 29 – 43 kg (ideal weight 39 kg); females 50 – 58 cm tall (ideal height 56 cm) and weigh 23 – 39 kg (ideal weight 33 kg). The breed is therefore lighter and athletic, which is equally tall but significantly heavier. There are two coat variants: short (less than 2.5 cm) and medium-length (from 2.5 to 4.7 cm). The texture of the shiny coat is harsh and dense. All colours and combinations are accepted. Behavior The Dogue Brasileiro is an active and balanced, yet alert, fearless, and watchful dog with a strong guarding instinct. Towards its family, it is obedient, gentle, and affectionate. However, it is serious towards strangers and will be ready to attack if provoked. It should not demonstrate aggressive behaviour without a clear reason – such as purposeful provocation – not even with other dogs. Instead of the more common working trial, a specific character trial