I have a BR who has had many problems in the past. In August of last year she had sour crop, a virus, and was egg bound all in a row. She recovered, except for a slight limp, but is otherwise fine. She became a year old in April, and is the diva of my flock. She talks all the time and loves food. But this morning, she just stood there at the end of the pen. No greeting, no nothing. She looked tired, and kept shutting her eyes like she was going to take a nap. I gave her some yogurt to get something in her, and she ate a little. When she wiped her beak, it was slow, not fast like she usually does. I didn't get the chance to see a poop of hers, but will try to later. Any ideas what could be wrong with her?