I have a older hen with a large distended abdomen, very lethargic, falls asleep just sitting, and she cannot walk. I am visiting my parents farm and I found this hen this morning on the floor under her roost. I palpated her abdomen. It is very soft (almost gas-like) I also internally palpated her oviduct to feel for an egg but could not feel an egg. I soaked her in a warm bath for 15 mins and gave her 2 crushed Tums for some calcium. Anymore advice or ideas?