I have 5 sweet girls who are 6 months old this week. I'm having trouble figuring out if they are all laying...I've never gotten more than 4 eggs in a day, and about half the time it's only 3 a day. I want more eggs! I have a feeling it's the Barred Rock who isn't laying, but I can't be sure because I don't watch them too closely all day. Isn't 6 months a little late to not be laying yet?