In the past month and a half I have lost 4 RIR in the same way...Become lethargic..combs go pale, abdomen swells up, gets difficult to walk, tails tucked and waddle. Poop is runny too. I had treated them all thinking Egg bound, but Today I dissected the latest hen to die and found a HUGE yellowish off white mass inside her texture was a hard cheese consistency. What is going on...it's ONLY my 2 y old RIR no other breeds.