So an elf walks into an animal shelter... ...and, being from the North Pole, he wants a hound dog to run a transport system. This particular shelter stocks only mutts. On the first day, the elf says, ""What type of dog is that one there?"" he asks, pointing to a cage. ""That's a cross between a Labrador and a Poodle,"" responds the clerk. The elf shakes his head, and moves on to the next cage. ""What type is this one?"" he asks. ""A German Shepherd and Beagle cross,"" replies the clerk. Again, t…