Barred Rock bantam hen almost 3 yrs old. Her back-end/abdomen area, (behind the legs, starting just beyond the end of the keel) is swollen big, feels really tight-not like solid rock, but not squishy at all. It almost feels air-filled (is that possible)? I recently changed feed from flock raiser to layena and I just started feeding dried meal worms pretty often too. This hen stopped laying about 2 years ago, vet found no apparent cause and said she seemed perfectly healthy. I do feel her abdomen every few months (fearing peritonitis) and she's always felt perfect. This is the first time she's had anything like this. She's acting normal though. Please help me if you can. I will call the vet first thing tommorrow but he's always in such high demand I doubt he will see her for a few days. Should I try to drain her? If so, where can I safely stick a needle back there? She's a bantam and I don't want to cause damage. Any of your ideas or thoughts are so appreciated, I don't want to lose her.