Late last summer, we inherited 7 chickens, 1 rooster and 6 hens. The move caused them to go into molt and it took almost 2 months before we started getting eggs. When they finally started laying, I guess I got chicken fever... and just after Thanksgiving we picked up 19 new hatchlings. 8 Black Sex Links - 9 Golden Comets and 2 RIR. Some are a week older than the others, but they are close together.
Yesterday, the oldest ones reached 17 weeks and we got our first egg. It was around the size of a medium egg and seemed more pinkish in color than the brown/tan egs we are used to from our older girls.
Last week on two different days, we got eggs out of their coop, (2 on one day and 1 about 4 days later) but I don't think they were form our pullets. I let both the older and younger birds free range in the yard together and I think one of my hens used the pullets coop to lay some eggs. I say this because those eggs were normal size and color and we collected them just prior to them turning 16 weeks old. I suspect it was one of our older hens as I saw her up in their coop around the nesting boxes this past Sunday when they were all supposed to be out free ranging. I did not know that hens would use a nesting box that they were not accustomed to, however both of my coops are identical in design and build.
Right now, I have my 7 adults in one coop and 19 pullets in the other. I want to even out the numbers between the coops and take one adult hen that gets too much attention from the rooster and get her away from him. Now that they are close to laying should I make the moves now or wait until everyone in laying in another month... I don't want to start getting eggs then have the shakeup cause them to go into molt and not get any eggs for 1-2 months. Or is there a chance that it will not really cause problems since they free range together and have already been interacting.