Are these mallard ducks?

My neighbor rescued 4 cute little brown ducklings from a school that was going to sell them at animal auction. We were wondering what kind of ducks they are. Thanks.

A farm breed of domesticated Mallard.

Resin

Thank you so much. My next door neighbor has them. Will they ever join the wild mallards if she lets them loose? I am afraid of wild critters eating them. They are in a pen with food & water, but no place to swim. Thank you.

They'd certainly like a pond, but won't survive well in wild conditions as they'll have no understanding of avoiding predators.

Resin

Most domestics can't fly and that leaves them as easy prey. A little kids plastic pool is fine for them to splash around and wash.

That's what I told my neighbor about the kid's plastic pool. They are putting together a large dog cage for the ducks and a larger doghouse for them to sleep in.