With hot tea in hand.. waking up slowly ..I would respectfully question that chicks were lost just due to them moving away from the heat. Chicks need a place to escape constant heat - watch a broody hen with hers. Even during a winter hatch, she doesn’t warm the entire space they are in, she just warms them directly when they go under her. The rest of the time, even at just a couple of days old, they are out exploring, playing, eating whatever she finds, and drinking out of mud puddles! They regulate their own needs. So I think that the chicks lost had another issue going on.
I raise my chicks, using Mama Heating Pad, outdoors in a wire pen within the run, even when our springtime temps here in Northwestern Wyoming are in the 20s, dropping into the teens, with sideways blowing snow. Every batch, every time, every year. And I’m far from the only one who has figured out the benefits of doing it this way. It duplicates a mother hen closer than any other method. Chicks can be fully integrated with the flock by 4 weeks and off all heat. It’s simply a heating pad without auto shutoff, a frame of some type, (I use a bit of scrap fencing, others use cookie cooling racks or similar) and you either drape the pad over the frame or use bungee cords to secure the pad on the underside of the frame. Most people find it runs them less than $30.00 total. And commercial heat plates are also great, although I like the cave system better as it’s closer to a Mama hen.
