M Kelly,
I don't actually have my ducks yet (have Muscovies on order) but it is my presumption that the ducks will eventually destroy the grass and turn it to mud (as will any animal repeatedly in the same space). I think to keep grass, you'll need to let them free-range or be able to move...
HI Marshall!
Can you help me out here. I've been wanting to get ducks for a while. I'm thinking Muscovies. I accidentally ended up with chickens first :) because I was searching Craigs list for a duck house, and instead found an awesome homemade chicken tractor. The owner had to give up...