My 23 week old black australorp laid her first egg Sunday (at least I believe it was her first--someone laid an egg Saturday but our chicken sitter found it). Since then, I've noticed her go into the nesting box and spend time there (once today and once yesterday) and not lay an egg. The shavings are all rustled up like she's made a nice little spot, but no egg. Just trying to rule out a problem. I'm new to this and this may be normal first-few-days of egg-laying behavior. Just thought it was odd and worried that she may be struggling. She is acting totally normal as far as I can tell. Thanks in advance for any advice. We have four chickens and two recently started laying, her included.