It may in part be due to time of year. Laying doesn't begin until about March 10 for me. So the earliest I can hatch anything is around April 10. Six weeks later is May 15 or so. It can still be pretty cold, and we can still get frost, but its not usually less than 35 by then. Maybe a little warmer most of the time.
My original birds all came from Murray McMurray. Maybe there are stock differences between Iowa birds and birds from further south. The adults do quite well outside when it's -30.
My original birds all came from Murray McMurray. Maybe there are stock differences between Iowa birds and birds from further south. The adults do quite well outside when it's -30.