I've been adding newly hatched chicks under a broody silkie now for five days. She had previous sat on two infertile eggs for two weeks. I just now added two more, and she accepted them. She now has seven. SILKIES ARE JUST NATURAL FOSTER MOMS. This all began when my vet suggested I put a preventive respiratory infection medicine in my chickens' drinking water and toss the eggs for two weeks. I had a blue Orpington hen that had gone broody so I put a lot of collected eggs under her. Then a black Orpington hen went broody, and I collected several days worth of eggs and put them under her. Between October 16 and 21, the blue hen has hatched out eight chicks, one died; they've each been put under the silkie each day with no complaints from her. There are none from the black hen or the new broody black hen that I shared her MANY eggs with. I don't know if there will be any to hatch, because the first black hen stayed off the nest for a long time after the third day. They were supposed to have begun hatching yesterday, October 20, but there's none yet.