As are dogs. Although many ARE fed an omnivorous diet, said diet is not the best for them.
http://www.rawfed.com/myths/omnivores.html
BTW I fed my dogs raw for years, I’ve read a lot on dog nutrition, been thru the dog feeding wars, etc. Dogs can survive basically on what humans throw out as garbage. It’s not what I would choose to feed mine, but for eons it’s what they lived on.