Avatar, You miss the point. The dogs lose purpose. They go through life, coddled and useless. What a horrid existance. Kenworth, Most life has moved beyond just necessity. Sexual selection is a pretty good example of this. Lions like to hunt. Big cats are known to kill stuff just for fun. They'll maul it a bit, eat a little meat, then leave it for rot and vultures. Hardly necessity. Play and fun and games.