I'm needing some advice on flock size for winter..... I started out with 6 chickens, but am now down to 2 due to predators and sour crop (we have now made our coop more predator proof and I have learned the hard way on how to spot and treat sour crop.). I live in Southern Illinois and it can get pretty cold here in the winter. Will 2 chickens be enough body heat to keep them warm at night in the winter? Should I try to find a few more hens? I planned on getting some more chicks in the spring, but just don't know if I should get some more now before winter sets in. I really don't want to use a heat lamp in the coop because I don't want to start a fire. My coop is pretty small. It holds up to 5 chickens, so I'm thinking they may be fine in there. Just not sure. Any advice would be great! Thanks!