I have 3 australorp hens, they're sisters, and the same age 19 weeks old. Only 2 of them are laying. They started laying within 1 day of each other. Elma Jane is yet to lay an egg. Is this unusual? I really wasn't sure. The two that lay are very friendly and would follow you off a cliff, Elma who hasn't layed yet is very shy. She won't approach you like the other 2, and holding her is out of the question. Could this have anything to do with her not laying? Do you think she'll ever come around? We're new to this stage in chicken development and I don't know if I should be worried. Please help!