A pack animal is a beast of burden used by humans as means of transporting materials by attaching them so their weight bears on the animal's back; the term may be applied to either an individual animal or a species so employed....
A working animal is an animal that is kept by humans and trained to perform tasks. They may be close members of the family, such as guide dogs, or domestications such as logging elephants....
"Beast of Burden" is a song by English rock band the Rolling Stones, featured on the 1978 album Some Girls. In 2004 Rolling Stone magazine ranked the song #435 on their list of the 500 Greatest Songs of All Time.... , originally written and performed by The Rolling Stones
"Beast of Burden" (Stargate SG-1), a television episode
