Whistle while you work

One of my winter projects is to teach Tell his whistles. I have grand visions of us working at great distance from each other this summer so I want to be prepared! A few days into this project, I realize that really I need to teach ME my whistles. I'm well past "spitting all over my wind shield and dash board as I cruise down the highway desperately trying to make this piece of plastic do SOMETHING" stage. I can play basic tunes on it now so it's time to move on to "real work".
Instead of hit tunes on the stereo, I listen to "Gaining the Winning Edge With Whistles". Good thing I'm alone all day...
I've been practicing in the house and have been doing quite well I think. So, this afternoon Tell and I went out to the sheep so I could start teaching him. I started. I suck. If I was my dog I'd be correcting me. I might even thinking about moving me along.
I'm going to give myself another week of remedial training before subjecting the poor dog to it again.

My "instrument" of torture...