Diet

Some sources describe dogs as carnivores. Other sources describe dogs as omnivores, despite their descent from wolves and despite their classification in the order Carnivora. Unlike an obligate carnivore, such as a member of the cat family with its shorter small intestine, a dog is neither dependent on meat-specific protein nor a very high level of protein in order to fulfill its basic dietary requirements. Dogs are able to healthily digest a variety of foods, including vegetables and grains, and can consume a large proportion of these in their diet. In the wild, canines often eat available plants and fruits.

Info from: http://en.wikipedia.org/wiki/Dog