Breeder confirmed that the puppies had an old tunnel to play in, on, and around for quite a while, so she was very familiar with tunnels. You should see her in the morning when she's loosening her bowels--she blasts into one U-shaped tunnel and blasts out and across the lawn without stopping and into another tunnel--
This is going to be one fast agility dog if I can get her to do the tunnels at the same speed and level of comfort with *me* making the decisions rather than her. The biggest flaw at the moment is that she often blasts to a halt inside the end of the tunnel to look around before taking off again. So when she goes in, I've been taking off running and calling her name, working to get her to follow me. I think it's working.
And she's having pretty good name recognition, too. I must've said it to her only fifty thousand times in the last few days, and I'll keep doing it, too.
Jake actually came outside briefly this afternoon while I had the puppy in the yard. That's progress for him.