Hubby just finished my run. It measures 100' x 45'. 2x3 welded wire all the way around and netting over the entire top, center height measures about 15' and slopes down to sides at 5'. Let the ducks out for the first time today and the Mallards thought they were "free" All 4 flew up, hit the net and dropped like rocks. What should I do? Clip their wings, put ribbons on the net, or let them get used to it? I am afaid that if they fly hard enough and at the right angle, their heads could get stuck in the net. Thanks