Just make sure she goes back. Usually as long as they hear peeping they will stick on the eggs but first timers can be a little fickle. Do you find this to be true Bob? Do you let your hens hatch chicks?Doing great! The last egg still needs to externally pip, but it should be close. The first 2 are already pecking around with mom.
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Should I be concerned about momma being off the other egg or is it likely just breakfast time? It's very alive and cheeping in it's shell. .