Temp Controler for brooding chicks

[Mr.Grantly]

We has such a crazy spring that our temps were up and down. One minute there cold the next minute there cooked. I'm looking for a better way to keep our chicks at a constant temp. This year we only did a 150 cornish x but next year I hope to do 500. Whats the best way to control the temp? We use infared now but is a gas brooder the way to go. Is there a temp controler for the infared?

Thanks Grant