Humans and canines have been closely connected throughout their mutual histories. While we don't fully understand how, or why, our two species came together, the bond between human beings and dogs is deep and complex. Although both species have benefited from this unique relationship, domestication has altered dogs in many ways, including their ability to choose what they eat. Dogs are physically built to hunt for animal sources of protein, a natural behavior that has been increasingly discrouaged as civilization has advanced. But even though they belong tot he carnivore group, which means they are meat eaters, dogs aren't obligate carnivores, like cats, because they are able to survive by eating plants as well as animals. This ability to survive on a varied diet also classifies dogs, like humans, as omnivores - a similarity that has enabled them to live easily alongside humans.