Thanks for the link, Guest. that's a nice song.

Why is a dog called Blue? Probably because it's a blue tick hound. These dogs tree their prey and then howl. Here's a video of a pup who has spotted, if not actually treed, a prey animal.

Clearly the prey animal just wishes it would shut up.

https://www.youtube.com/watch?v=_--x0b9fiUY