Hi! I have a hen that is maybe 2-4 years old. I got her from a friend and Im not sure of her age. She has been lethargic, breathing faster/heavier, puffing out feathers and easy to catch for about 2 days now. We have her in a cage isolated for over 24 hours now. She seems to be perking up but still not moving around much. She is drinking water and eating some-mostly meal worms. Her stool is yellow and some brown-looks different than the norm. Not sure what is wrong with her, any thoughts? Thank you.