My Maran hen has never laid an egg, she is around 10 months old. She eats Layena pellet food, she is free range, and lives with 6 other hens. She eats very little and poops very little, but the poop looks normal. She is very listless and unenergetic. She had been sick 2 times before with a mystery illness but has recovered, but her vision has been compromised. I had wormed her after her illness horse wormer. Her behind has seemed to have swollen, it is squishy and sensitive. She has had these symptoms for quite a while, maybe a month. What do you think is going on?