I was going to post this with the pictures, but it was taking ages to process.
I finally got it to work.
Here are Sacha and Yukon.
With background vocals by George, who was not happy to be left in the house.
Sacha was starting to get upset by the camera, so I stopped.
But you get an idea of this lovely singing voice.
Oh, and he learned to howl a few days ago. Let's hope he limits that to times I am already awake.