I guess I got lucky with my BR girls (3 of them) My middle sized one, Baby Girl, started laying Sept. 1st, just before she turned 18 weeks, got one egg a week for 3 weeks. Then she started laying everyday, but rested on the 6th or 7th day. Fiesta started laying about a month after Baby Girl, steady for 5 days, then took one day off.
After the first week of Oct. Queen Bee started laying, she went about every 3, then took a day off.
About a week ago I noticed our roo, Owl was starting to go after one of my BO (most of the combs & waddles have changed to bright red in the last couple week - have 6 BO's). So I wondered if she would start laying soon, well I got my answer this week, she laid her first egg on Monday & Tues, took a break yesterday, and laid again today.
My BR & BO are all the same age, born the first week of May, and I did not expect to see eggs till the middle to late Nov. So I was thrilled when I started getting eggs in Sept. I know my EE are not going to be ready till after Thanksgiving, and my Light Brahma's sometime before Christmas. If they lay fine, if they wait till spring, that is fine too.
My girls are all Feed Store babies, I like Mutts.
As of Sept. 1st till today, I have gotten 70 eggs, the last 3 have only been laying between 3 weeks - this last week. So I am quite happy. Enough to share with my neighbors, (Hush Money for a crowing Owl, aka: our roo)
& to give to my Daughter's teachers.
Mine were squatting long before they started laying, and had red combs & waddles about 2 - 3 weeks before the first egg arrived. Am kind of taking my cue from Owl, if he starts mounting them, then they should start laying soon.
Good Luck out there, hope you get your eggs soon.