Chipmunk has been acting weird for a week now. First she started skipping laying days after being quite reliable. Then I got a soft shelled egg, then nothing, today she layed nothing more than a yolk wrapped in a membrane. She's been standing around with her eyes closed for the majority of time for about 4 days now. Ever since the soft shelled egg. She eats, drinks, forages, most enthusiastic at treat time, still chases the other ones off. Then nothing, she doesn't do much. The yolk thing she was standing over in the open, she didn't even put it in a nest. I approached her to check on her, normally she runs since she hates me, but she only took a couple of steps. She's not breathing weird, doesn't have a runny nose or watery eyes or discharge... just "tired" all the time and laying weirdly. I grabbed her yesterday and felt her all over, checked her vent, everything appeared fine. Any ideas? Everyone else is laying perfect eggs on schedual, they get an awesome diet, I can't figure it out! She's only 2 years old, bantam D'Anver hen.