Just found my RIR hen broody this morning, this is her 3rd year but the last 2 she waited till May. I posted a question earlier about weather cold eggs will hatch. I took several small pullet eggs from her as they were very small, there are some other eggs in the coop but they are very cold, its only 23 degrees here. Will they hatch if I give her those? What about the eggs Ive had on the counter in the house for 3 days?
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When placing "cold" eggs under a broody hen do it one or two eggs at a time....wait about 6-8 hours and do it again! I've had broody hens abandon a nest that had too many "cold" eggs placed in them. Last year I experimented with near frozen hatching eggs, they were left out over night in 20F temps brought indoors allowed to warm to room temp and went into the bator the next day. Out of 24 eggs 20 hatched....3 candled clear after day 7 and the one that didnt hatch was fully developed but dies in the shell. I'm not suggesting everone "freeze" or refrigerate hatching eggs but I wanted to test it for myself. Perhaps if an egg remains frozen for several days rate rates might be significantly lower??? I've never found any research on this personally.