wrote in message
oups.com...
The dog would play fetch all day if us humans
didn't get tired of throwing it.

I want to build an automatic thrower. Train
the dog to drop the ball in a 'hopper', the
machine waits 10 seconds, beeps, and throws
the ball.

Despite the appearance that the dog wants the ball, it's the interaction
with the thrower he's really asking for. He'll get bored with a machine in
just a few throws.

LLoyd