So I have noticed a hen who is 4 years old who is slow to move. It is 9am and she is still on her roost. She does eventually come down, but last night she was in a nesting box until bed time. I pulled her out checked her legs and they were fine. She was breathing a little heavy but had been 90 degrees that day. She immediately went outside and drank water, almost like she was dehydrating herself. Is this a sign of something medical and if so I should move this over to the medical forum. Or is this just an older chicken thing. She has been laying regularly and lately here in the PNW we have had a mix of 3 rainy days and then 2 nice warm days and finally today is just cool (topping out at 70).