Afghans are perhaps more like cats, which are not beholden to anyone. This is no doubt why some people rate cats as less intelligent than dogs. We know, however, that a cat’s lack of response to humans is not due to ignorance. A recent study showed that felines have no trouble recognizing their owner’s voice. The deeper problem is that they don’t care, prompting the study’s authors to add: “the behavioral aspects of cats that cause their owners to become attached to them are still undetermined.”40