I have a hen that I treated for everything under the sun. Nothing is improving her condition. Her symptoms are a shriveled up comb and she stands around with her neck tucked in. She's been like this for several months. She's not getting worse....but not better. I examined her abdomen and it feels like on her left side there is a hard lump. But its not anywhere an egg should be. Could this be a tumor? She eats but very little. She definitely has something wrong with her but I have exhausted all means of helping her. Any new suggestions?