My Rouen had a broken leg and I put a splint on it and confined him for a few weeks. Now he is doing great. He limps a little but it doesn't slow him down. Good luck!
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I had to separate my Rouens from the chickens as the drake kept after the hens. My ducks won't come in at dark without a little mealworms encouragement. So don't know how an automatic door closing would work, maybe Muscovy are different.
I started with 3 Rouens. One suddenly died, healthy the day before. Any idea why this would happen? I'm new to raising ducks but have really gotten attached to them. Mine are about 2 months old now.