My husband told me today that he thought one of the barred rocks was ill. She is older. My chickens are free range. So this evening when she returned to the chicken coop, I was able to pull her out and take a look. I have no experience with this. Actually, I have only had chickens for about five years. She appears to be prolasped, but full of maggots. I couldn't think of anything else to do so I poored mineral oil into that area after washing her. I was hoping to force the maggots out. I also placed a piece of worm medicine you give dogs internally, only I placed it in the vent. Then I put her in a box in the garage so the other chickens wouldn't pick at her. Until today, I didn't notice her acting funny. I really didn't no what else to do that I had around the house. I saw someone else say to put kerosene on her, but that seems cruel. Can anyone tell me what is the proper thing to do? I keep them powdered.