The places you need to go to escape

Now, this is a sight I thought I'd never see - Rusty in a crate of his own voilition.
Rusty has never been comfortable in a crate. He hated being in them at agility trials with Amber, but was a lot happier once I got the puppy pen. He didn't feel as constricted I suppose.
Imagine my surprise when I found him asleep in the crate! I suppose you have to resort to these things when you need some time out and just want to escape from the puppy.