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.
Infections, allergies, and mites. Although not as common as the need to clean itself, your dog may also be rubbing its face in the carpet to relieve itching and irritation caused by infections, allergies, and mites. The most common infection that would cause a dog to rub its face in the carpet is an ear infection. If you notice your dog rubbing its ears and face in the carpet on a frequent basis, look for discharge from its ear. If its ear is red and swollen, you should take your dog to the vet.