I give babies to clucks all the time..
this week I had a goose hatch out 2 goslings while I hatched out one in the bator.. after 2 days I took the bator one in broad daylight and agitated the goose and gander, who was standing guard.
when they were intent on biting me, I gently tossed the new gosling under the goose.. they were so intent on protecting their family, that they never noticed the new guy.. two days later, I took two ducklings out and just turned them loose in the nest.. the goose accepted them also.. now they can raise them and I can concentrate on other things..
I have put just about every type of egg under just about every type of bird.. goose under chicken , quail under chicken,guniea under turkey
they all hatch..