I have a flock of Astralorps and Buff Orps. All young hens laying heavily. One Astralorp got sick. Green runny poo, tired, laying down all the time and would barley eat. I isolated her immediately. She got through it and is a very healthy part of the flock. But I haven't seen her lay an egg since she got this disease. Its been at least 3 months. Can disease totally sterilize a hen making her unable to lay eggs?