My 2 year old Australorp hen has developed an issue with her crop. It is extremely large, has sagged and flops side to side when she moves and she has lost the feathers from her chest. It does not fill up during the day and turn firm so she can digest her food at night. It just stays floppy. She runs all over her 1 acre pasture, eats & drinks and behaves like nothing is wrong. In fact, when I went out to take this picture this morning she came running up to me with her crop just a floppin'. Wondering what could have happened. Could her crop have ruptured? I would hate to loose her. She was my best mom this spring, hatching out 10 of her own chicks then adopting 8 of another hen's chicks when this hen abandoned her chicks.