Catch the hen very gently, being careful not to squeeze her and place her in your sick bay. Soak her favorite grain with wheat germ or any vegetable oil. Give her 15 grams and no other food. She will be extra thirsty, so make sure she has clean fresh water and plenty of it. Place a 150 watt red bowl infra-red lamp 18 inches above the floor in one end of the pen.
Heat lamps work by radiating the bird with infra-red rays.
If the lamp is too low it cannot work as designed. With the oil to lubricate her and the heat to relax her, she will pass the egg within 24 hours. We have extracted soft shelled and mis-shapen eggs with this system with no harm to the birds. The Blyth's passed a perfect egg, so we set it in the incubator immediately, as we had no way of knowing how long it had been incubating inside the hen. This system has worked well for us over the years and may save a bird for you if one of your hens gets into trouble.