Wash your hands and kids hands after handling...ducks are way grosser than you are imagining I promise...I wouldn't keep one inside if someone paid me...ewww and yuck...they are cute and pretty and nice to look at an watch and what not though. I've f my ducklings game bird starter, and regular chick starter with brewers yeast sprinkled on top and also in the water for extra niacin. No need for niacin when using the game bird food.. Have also used flock raiser with no added niacin, and meat bird food with niacin added. Everyone is doing well and about to get all their feathers now...I was having a hard time choosing what to feed them as well. i would have stuck with the game bird starter, but I could only find it in tiny little bags, and ducks eat a whole lot..since I have way more chickens than ducks it makes more sense to just give them chick food...if I had only ducks it would be either the game bird starter, or the flock raiser...probably the flock raiser since it comes in 50lb bag I can find without driving all over the state...
Anyway I was unsure what was best to feed them so I figured I would just try it all, and that seems to have worked...lol. A little flock raiser this time, chick starter the next time, then game starter, then flock raiser, then meat bird food with flock raiser mixed,,,etc. short answer...whatever is alright for chicks is alright for ducks, but look for something that says it has active yeasts to promote digestive health, and if it doesn't say that then just add brewers yeast...it's in the grocery store. Or you can get fancy and get a niacin supplement, but the brewers yeast is cheaper and easier to find...blah blah blah I'm going on and on.
I have some questions for you...Is your apartment manager alright with this plan?
How do you plan to get the ducks to and from said pond, and do you have any idea what ducks smell like?
And another thing to think about, 6 Pekin ducklings are going to act like you are satan about to bite off their heads as suck out their souls..I thought they would like me, but nope...not a bit. Not at all. They run from me and I've tried handling and handling and handling them...
Anyway go by a Feed store and give the duck bin a goo sniff and then rethink if this is something you want to do...I would rather change a hundred babies than one duck...their poops are so freaking gross. One hour or less after scrubbing out the brooder they smell like crap again. So gross. I have 4 Pekin outside in a brooder and had 2 mallards (later added 2 more) but those 2 tiny ducks make 4 times the mess and smell of the 17 chicks right beside them...I mean it's heinous. I will keep pigs in my house before I ever let another duck inside...