Welcome to BYC. Do you have a safe place, secure from predators, outdoors? If so, you can create a small, protected brooder inside your coop.
Put a heating pad cave (set to low temp. This is more for comfort, as your outdoor temperature is warm.) Inside a cage with small enough wire to keep the chick inside. Make sure the keet can see and be seen by the hen. After a few (4 to 6) weeks, you can let them interact.
Put a heating pad cave (set to low temp. This is more for comfort, as your outdoor temperature is warm.) Inside a cage with small enough wire to keep the chick inside. Make sure the keet can see and be seen by the hen. After a few (4 to 6) weeks, you can let them interact.