hi friends, i've got 5 hens and they were all laying after they turned about 5 1/2 months old....until the weather got a bit cooler and they just stopped. Is this normal? The weather cools down just a little and so they stop laying altogether? it's not that drastic a difference in temps but it does get colder at night. (40-50 degrees instead of 60) I live in middle tennessee. any insights? thanks!