I have big Orpington hen 3 years old. Her sole purpose in life seemed to be to eating. But in the last 3 days she is not eating except for grass. I had mixed a little bit of brewers yeast and a little bit of 24% protein crumbles in their crumbles.i also have (3 juvenile hens) that haven’t been sick. Other than not eating she acts as she always has, verbal, active, seems like she’s eating grass but can’t tell. The other hens have started their juvenile moult, and I wondered if she was going to be molting soon. It seems I remember all of my chickens molting during this time of year. Has anyone else with their chicks not eating and molting at same time