It’s quite natural for dogs to howl, as annoying as it can be sometimes. They hear another dog making a high-pitched noise and they invariably have to join in.
And if there are no other dogs willing to start around at the time? Then this keyboard will do as an alternative.
This dog seems to have hit on an idea that he likes so much he’ll keep doing it long after it has stopped making sense. He plays a chord with his nose, howls at the resulting sound, and repeats until bored.
I’ve always thought dogs must have extremely boring lives, and I guess this video proves that in no uncertain terms. Or perhaps this particular canine does actually belong to Elton John.