For those of you who keep indoor ducks, what have you found makes a good pen? Have you built houses and runs just like outdoor ducks would have, or do you do something different? I've been keeping my duck in a fenced-in portion of the room with a tarp on the ground, but the tarp gets nasty pretty fast and can be a pain to clean. Then again, ducks are messy by nature, so maybe that's just something I have to deal with! I'm moving soon (renting), so I'll have an opportunity to think about new pen ideas. Just wondering what works well for other people who keep indoor ducks. Any photos you can share? I did a search on here and found the computerized plans for Nettie's indoor pen, and all I can say is WOW! Those are some lucky ducks she's got!