We have a bantam Easter egger hen about 16 months old. We have noticed in the last several days her staying puffed up and has progressed to being less active staying inside the coop more and realized she has lost weight. Her breastbone is more prominent. There has been no other illnesses with the chickens and other than one chick that hatched about 3 weeks ago no new flock additions, although we have a chicken whom we had been keeping inside due to being pecked who mixed briefly with her outside the run. Her stool is white mixed with brown and seems usual consistency. We took her outside the coop and she ate some yogurt which is one of her favorites and also mealworms and some feed. She's getting weaker and had difficulty getting up the coop ramp today. She was broody about six weeks ago and another hen took over her eggs after she sat for three weeks. She hasn't laid in about a week now. Her crop is soft, and I don't feel anything solid on her abdomen (not sure if you would if she were egg bound). We have no avian vet in our area, or I would take her to see him. Any suggestions or ideas on what may be wrong?