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.
Digging dogs, uneven soil settling, poorly done grading and roots can cause depressions and holes in a lawn. Removing trees or shrubs from the area also will create a hole. The hole requires filling with soil for the area to be level with the remainder of the lawn. Leaving the hole open will not harm the lawn and grass will grow to cover it, but the area can be dangerous. Children or others walking across the area can trip on an uncovered hole and injure themselves.