About 2 days ago our Rhode Island Red started having trouble walking. She will take a few steps very wobbly and then sit down. She is still eating and drinking. We don't see any injuries to her feet or legs. We had hoped she would get better but she doesn't seem to be. We have been having extreme heat for many days in a row. Could she have suffered heat stroke? Can she get better or is it time to ethanize her? We are new to chickens and have never had to kill one. I am sick to my stomach at the thought of having to kill her but I hate to see her suffer, too.