I am in Michigan. It was pretty hot last week and rained a lot but has since cooled back down to the 70's. I did start adding Flax seed to they're food which is the only change I have made. I think I did add to much the first time. It was right around that time that they quit laying. Could it be the flax? They free range in my backyard almost every day so they are never really locked in the coop/run except at night. No new birds and nothing changed in the coop/run. I guess the only change was the flax seed. Should I not add the flax?