How big is your coop that have 3 heat lamps and the temps are only getting to 26 degrees???? I have babies with a broody outside in a coop, not insulated and they did wonderful in 19 degree weather!! Loose the heat lamps and add regular bulb to add more light and you'll prob start seeing some changes!! Their also probably stressed from staying inside the coop so much. There is no reason why they can't go outside even if the weather is below 30!!
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