I agree with Destin.
I also advise not putting calls or ANY domestic ducklings or chickens in with migratory waterfowl, if so, just do it for 1-2 day then pull them out. They are bullies, aggressive, and disease carriers. They only species of migratory waterfowl that usually require aid in learning to eat are the diet specific diver ducks that eat fish and animal proteins. Aside from them, they'll know what to do, in any case a few meal worms in the food dish will get any species to eat.
Main reason for not keeping calls and stuff in there is they are aggressive feeder, and grown 3 times as fast as migratorys, so they will bully they shyer mandarins away from the food.
Read over the first 4-5 pages of this thread
https://www.backyardchickens.com/forum/viewtopic.php?id=345303
it'll tell you a good bit about the care for all of them.
And yes also like Destin said, any type of cavity nesting waterfowl can climb like a squirrel when young, they have specially designed toe nails similar to fish hooks. They can and will climb straight up a slick cardboard box! To avoid all that, take a pair of nail clippers and snip off the tip of each nail, just the very tip, you'll see the hook part once you get them. That's their cliff hanging device, LOL It will keep them from doing it if you need to stop them
good luck, they arent bad at all, one of the easiest to raise actually. and $10 each is a great price, you are paying less than most pay for eggs (which is crazy to me in the first place, the egg price I mean)