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I have a hen that seems a little quiet, she is eating but not as much as normal she is grooming herself and is a walking around the garden ok. She is rather thin, and her abdomen is warm and swollen. Her droppings look ok, if a bit small. I have had to wash her rear as it is a bit messy. She has not really come back into lay properly after moulting last Autumn. Any thoughts as to what it may be. She is 3 years old- is this old for a hen??

Tiffany