If it keeps the chickens warm, it's fine.
If the chickens eat it, it's fine. (referring to food)
If the chickens go unmolested, it's fine.
If your dog barks, predators should stay away. What you really need to worry about are raccoons. My friends have one that is slowly killing all of their birds, because it knows what a live trap looks like. What it comes down too is that you need to be willing to do what you need to do when it comes to protecting your birds.
If you get Mallards, or any type of duck that isn't Rouen shaped, then at least one of the wings needs to be clipped regularly. If you show, they make you only clip one, which is dumb, because I know lots of ducks that fly just fine with one wing clipped, and my friend lost half of her ducks because she listened to the show people.
Generally they're right, but all animals are different.
sorry for the novel. Good luck!
If you decide to show, feel free to PM me with any questions on showing ducks. I have sources.
edited for dumb mistake.