I have 3 hens that I have had since the beginning of June. The white rock was much smaller than the other two when I got them. I have no idea how old they were when I purchased them. I just built nesting boxes a few days ago and placed hay and a golf ball in each one. They won't get anywhere near them. They are much lower than anything else in the coop, so I am assuming it will just take time. I know this is a educated guess, but by looking at the pics can you tell me about how long before they start laying. I am assuming it will be in a few weeks. I have been told it varies by breed and by chicken, but generally 16-18 weeks is when it should occur. Thanks for your help and all guesses are appreciated.