Origin of the domestic dog as the Tibetan people. A population genetic analysis then showed a significant convergence between humans and dogs in Tibet. Like the Tibetan people, Tibetan mastiffs appear to have derived these benefits partially from the EPAS1 gene, acquired through introgression. In 2015, a study found that when dogs and their owners interact, extended eye contact (mutual gaze) increases oxytocin levels in both the dog and its owner. As oxytocin is known for its role in maternal bonding, it is considered likely that this effect has supported the coevolution of human-dog bonding. One observer has stated, "The dog could have arisen only
Small Greek Domestic Dog It is always in motion, showing the dog's joy. The coat of this dog forms a brush under its tail. This breed of dog has large eyes which vary in shape from round to more of an almond shape. They are bright, intelligent, and are not deep-set. The color goes with the color of the coat, but they will never be transparent or blue. The muzzle "tapers easily to the nose", and the topline is level. The nose of the Small Greek Domestic Dog has well-opened nostrils. It is not too large compared to the muzzle, and it is moist,