She now will not go in the coop with her sisters in the evening but goes into the garage and lays down in a corner. I bring her in the houseand put her on an elevated box with a rug so she is warm and quiet. I have been giving her 1/2 of a 80 mg aspirin in the morning and evening wrapped in some damp white bread which is about the only thing she will eat . She is incredibly weak and I went to 2 vets looking for some anti-biotic but they were not chicken vets and seemed indifferent and curious why I would care about a "low value farm animal" Guess I am silly but I got her when she was either 2 or 3 years old and had her for 5 years so you get attached to them like people do to dogs and cats. I think she has some sort of cancer/infection inside, her belly is pretty full and her poo is a runny yellow looking ,mess that sticks to her rear and has an infectious strong odor. I clean it every once in a while but she does not like it so trying to not traumitize her too much. I am just worried she is in pain, even though she is very quiet and the one vet wouldn't give any antibiotic without a $50 office visit. I just don't see the sense in throwing away $50 just to have the vet tell me she is old, dying and offer his services for another $35 to put her down. Is there any medicine I can buy over the counter that is an anti-biotic? I went to a big local farm supply store but they didn't have medicine like that for chickens.Maybe some human medicine from Walgreens for fighting infections can be bought without a prescription? I doubt if she will last 3 more days but want her to die peacefully without pain if possible. Thanks.