First, the dog thinks that the owner wants to feed food, so he will put his hand on it and ask the owner for food.
When the owner fed the dog food, the food was thrown at the dog from his hand. In dogs' brains, they think that their master's hands usually turn into all kinds of food, so they also like their master's hands very much. As soon as the master reached out, the puppy cocked its paws, cocked its nose, licked its master's palm with its tongue and asked for food.
Second, it is also a friendly behavior for dogs to show their love to their owners.
Dogs are extremely intelligent animals, and they are very cooperative with their owners' movements. When the owner is happy, Doby dogs will also show a happy mood. When the owner reaches out to the dog, the dog will also have a strong reaction. Their claws will hold their master's hand tightly and won't let him leave. At this time, it is time for dogs and people to cultivate feelings. The owner can appease the dog and let the dog feel the warmth from the owner.
Third, it is not excluded that some dogs are professionally trained and regard this reaction as a conditioned reflex.
Some dogs are special. When an outsider reaches out, the dog will also put its paw up. But this is not out of their original intention, but a conditioned reflex through professional training. If the dog reacts, it will immediately run down from the hands of outsiders, and it will also give outsiders a dirty look, so that others can feel the freezing chill.
So, should the dog take over from the original intention? Or do you have professional training to join hands with others?