The dog is a domesticated descendant of wolves. Dogs and the modern gray wolf share a common ancestor.Dogs were the first species to be domesticated over 14,000 years ago, before the evolvement of agriculture, but genetic studies suppose the domestication process may have begun over 25,000 years ago. Due to their long connection with humans, dogs have gained the ability to thrive on a starch-rich diet that would be insufficient for other canids.
