Should I add a heater?

[Dooner]

I have a mini coop in an unheated garage with a bantam SLW sitting on five regular size eggs. This is my first time. I am in Wisconsin where the temp dips. Should I add a heater or will she be okay?

 

[kathyinmo]

I have one week old chicks outside in a garage with only a heat lamp. They are fine.

You do not need additional heat.