Meet the dogs who have carved out careers for themselves

Teabag a greyhound-whippet cross rescued from a bad home is poised to join the Rockwood Animals Dog Display team -- if he can leap through the burning rings of fire. Dennis and Natalie rely on Harris and Barack to alert them to different sounds. Now it's time for these hearing dogs re-certification test. China, a ten-week-old Great Pyrenees pup, learns to guard a valuable flock of alpacas. Also test your brain by answering interesting question on Giraffes through our weekly contest.