Many people believe that animals can show that they are happy , frightened, or angry. People who study animals say , for example , that elephants show joy when a new baby elephant is born , The elephant show sadness when a close member of the herd dies. When the member late pass the place the elephant died, they pause. Some scientists say that animals like dolphins and monkeys seem to enjoy playing in groups.
So who knows? When you fell happy to see your dog when you get home , your dog is probably happy too.