Im not really sure whats going on here. I have a Brahma hen that is around 2.5 years old. All of my hens have not laid in close to two months. this particular lady has been acting different than the rest. Stays in the coop during the day and just recently was outside and would not go back in around dusk.. she would not move even if we gave her a little push. I have noticed she seems to be real heavy and her lower area almost seams to be swollen. Two days ago I separated her from the the rest, she wouldnt move just sat there. As I picked her up she threw up... well liquid came out of her mouth as I was moving her. I set her on the ground in a separate area. She only moved to catch the sun all day. she has been in the garage under a heat lamp for the last two days. She wont move waddles funny if she does and wont drink. I was thinking a cold, then egg bound, and now I am thinking some kind of internal tumor. Any ideas as to what it could be? It has been cold here at night.. in the 30-40's and around 50 during the day, damp too. Should i let it play itself out, give her some medicine of some sort or put her down? Thanks!