I have 6 red sex linked hens and 4 have stopped laying. They are not moulting, they get Purina Laying crumbles, their combs are red, they are acting fine. I give them treats only once in a while. Help
Well, there you go. That is a massive change in temp. It's understandable that it caused physical stress on her system and she was unable to produce.
Be sure that there is plenty of shade accessible throughout the day, and that they have plenty of cold water to drink.
Agree, hit the nail on the head