Lonesome Dough
Chirping
that answers a lot of questions and solves my flat surface dilemma since the interior is OSB lined. I'm not too worried about it being predator proof since my run is going to be chain-link and has a concrete footing already poured. Run construction was supposed to be a winter project but I got exactly one post up before we got buried. I shoveled it out twice and gave up after the 4 foot drifts appeared.