A dog will make eye contact. A cat will, too, but a cat's eyes don't even look entirely warm-blooded to me, whereas a dog's eyes look human except less guarded. A dog will look at you as if to say, "What do you want me to do for you? I'll do anything for you." Whether a dog can in fact, do anything for you if you don't have sheep (I never have) is another matter. The dog is willing.