One of my original hens (6 years old) is sick. She has not been walking well for 2 days and puffed up. I removed her and put her in a stall in the barn. She has just been laying in the same spot all morning with her eyes closed. I've brought her inside since I think her end is very near. Her crop feels empty, stool is brown and white, not puffy but fairly normal looking. She hasn't laid any eggs in close to a year so not egg bound. She is not eating or drinking. I've been giving her a little bit of water with ACV in it. I'm thinking it's just age related but I want her to be as comfortable as possible. Thank you.