ocr: Dog Originally bred from wolves and jackals some 10,000 years ago, domestic dogs are meat-eating mammals that have gained a special place in our affection because of their intelligence and social nature. In the wild, dogs are pack-hunting animals, and domestic dogs have modified this pack instinct into obedience toward their owner. There are around 400 different breeds of dog today, and working dogs are used on farms, - as guard dogs, and by the security forces.
