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.
If you tell him to stop whenever you see him doing it, he'll eventually stop altogether. My dog used to do it on the couch too, but I would just tell her to stop, and if she didn't, I'd just take her off the couch and put her on the floor. She soon learned that she wouldn't be allowed on the couch if she did that, so she just stopped.