My 2 buff orp girls are almost 29 weeks and still haven't laid the first egg. They've been passed by our 19 week old silkie who pops them out faster than we can eat them. What gives? Should we be concerned? They do not free range, and we check the coop continuously. We've heard the egg song a couple of times and have gone nuts trying to find the egg. Nothing. We even feel up the girls daily lol. Any advice? Thanks!