My 9 Buckeyes, 2 yrs old, are losing lots of feathers. The feathers are all the fliffy, small ones , looks like from the breast & belly area. No one hen has a noticible bald spot. The weather here has been hot, 90-95, for weeks and is predicted to be that way for a while. I have been feeding extra protein and make sure they always have fresh, cold water. So is this because of heat or an early molt? They all seem healthy, have not lost weight, and are eating well. Anything to be concerned about?