【简答题】We have heard it repeatedly: most people do not get enough exercise. Yet when we look at our dogs, we say we do not give them enough exercise either. Do dogs enjoy exercise? Of course they do. Just as...
【简答题】Dogs can also go to school to learn how to help people who cannot hear. If a person cannot hear, we say he or she is deaf. Dogs who help deaf people must learn many different sounds. Then they must be...