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It is estimated that dogs were first domesticated around 15,000 years ago. They were used for companionship, hunting, and even for their meat in some places.

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An evidence of dogs being domesticated was found in a cave in Iraq dating back 12,000 years. They were able to see it was a dog because of its smaller jaw, and wolves were selectively bred in order for them to have smaller jaws.

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In Egyptian murals, there are paintings of many different species of dogs, being small and large. Egyptians believed that small lap dogs could cure stomach aches.

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In Rome, Shepards would be the people that would mainly use dogs. They specifically bred dogs so that they would be white, to help distinguish them from wolves in the dark, while a farmyard dog would be black to help scare thieves.

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Many different places used dogs to fight in wars. One of the most famous uses of dogs in wars is in 600 BC. Lydian dogs served as sentries or patrols to protect them. They killed invaders that tried to trespass, and routed other invaders to leave the area.

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Dogs have been bred for many different things. Guard dogs are bred to be bigger in order to be scarier, while some dogs have been bred to be loyal to their owner.

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Dogs now are used for many different things. They can be used to guard houses or animals, they can be used for companionship, and some places (Such as China and Asia) use dogs for meat. Although these places eat dog, the WHO advises against it, as dog meat can contain rabies.