abdominal mass and diarrhea

[roxnut]

My chicken is about 3 years old and lately has had watery diarrhea and has a solid feeling abdominal mass. I put on some gloves and did a rectal exam and was able to advance my finger all the way to my knuckle at which point the intestine took a turn I cannot negotiate with my finger. She continues to eat and drink well. I don't know if I am dealing with a tumor, internal egg laying, peritonitis. I have seen references to draining the abdomen with a needle and syringe. Any ideas? Thanks.