Underdeveloped chicks can be rescued with vitamins and special high protein feedings. When I have a chick such as yours, I keep it with the brood so it will be stimulated by competition to eat, unless it's too weak to compete.
It can't overeat. Let it have all it wants. If it should start to fade, give it warm sugar water to revive it. It can be touch and go at first, but some do make it to adulthood.
It can't overeat. Let it have all it wants. If it should start to fade, give it warm sugar water to revive it. It can be touch and go at first, but some do make it to adulthood.