We lost a leghorn today from the same apparent illness that took out our RIR in the fall. Symptoms as follows: Hen has more pronounced droppings on bottom. Hen stops laying. Hen acts like the want to lay but cannot. Abdomen of hen gets more swollen and hard as time goes on. Hens more lethargic, lays down regularly, and does not bounce back after treatments of copper sulfate, cleaning off bottom, and rounds of antibiotics. Any insight as to what is causing this? How can we prevent this?