狗是人类最忠实的朋友,在乡村里几乎家家户户养狗。它们一直陪伴着人们,就像不能分开的左手和右手。可是对于狗,许多人并不是很了解它们的习性。你有没有发现:狗在回窝睡觉前,总要围着窝绕几圈。它在做什么呢?原来,狗是由狼驯化来的。在野外,生存法则是弱肉强食,所以狼总在杂草丛生、不易被发现的地方做窝。在进窝之前,狼总要先绕 Dog is the most loyal friend of mankind, almost every household dog in the village. They are always with people, like left and right hands that can not be separated. But for dogs, many people are not very familiar with their habits. Have you ever noticed: dogs in the nest back to bed before going to bed, always around the nest around a few laps. What is it doing? Originally, the dog was domesticated by the wolf. In the wild, the law of survival is the law of the jungle, so the wolves are always overgrown, not easy to find places to nest. Before entering the nest, wolves always first around