She is about 4 years old has not laid eggs in 2 years. she was fine until 4 days ago. She is walking like a penguin and is week. She is still eating and drinking. She will not go to her roost either. She is the only chicken left of 10 she has been along for a year now. She has always been the tough one and the flock. I have given her electrolytes and probiotic the last few days. I did start Corid yesterday after seeing it on her. Her throat looks a little puffy i felt is and there is just one spot that is hard and it is tiny. She has diarrhea it is water also. PLEASE HELP thank you