ABO and distribution by country[edit] 50.0% and above 40.0â49.9% 30.0â39.9% 20.0â29.9% 10.0â19.9% 5.0â9.9%. Blood group B has its highest frequency in Northern Asia and neighboring Central Asia, and its incidence diminishes both towards the west and the east, falling to single digit percentages in Spain.
Dogs routinely dig for several reasons, all of which can be seen as instinctual behaviors that they got from their ancestors. One reason your dog may be digging into the couch is due to how dogs would dig out dens in the wild as a place to rest and protect themselves from various predators. Another reason may be due to your dog wanting to conceal the place where they sleep, like animals do in the wild.
Pits were created to be the ultimate fighting dog. Most pits will end being dog aggressive, which is what they were bred to be. The reason why pits are being dumped at shelters is because the naive owners soon discover that it is NOT All in how you raise them when their pit mauls or kills after reaching maturity. You CANNOT  love a dog's instinct out of it.