I have 7 hens all of them were last may chicks. 5 of them started laying in the fall, I have two that have yet to lay and still have no physical changes suggesting they will start soon.
Make a note of which ones are laying vs. not laying, and keep an eye out for them in the future.
You may find that the same two are slackers every winter, which might be a reason to replace them soon. Or they may turn out to be your best summer layers, if some of the others go broody and they don't, which would be a good reason to continue keeping them.
I need ideas of how I should rotate these girls out due to all being the same age. I’d like to keep my number at 7.
It is easiest to add new chickens in groups of two or more, rather than one at at time.
So if you want to stay at 7, keep an eye out for which ones you might want to cull (example: laying but not very well, tendency to be a bully or a victim in the flock, anything that would cause a specific hen to have special care needs.)
When one or two hens die from any cause, or need culling, count up all the maybes that you've been watching, and that tells how many new chickens to get at that time. If you are getting adults, buy the right number, cull the ones that were on the watch list, and introduce the new ones. If you are getting chicks, buy the right number, but don't cull the watch-list yet. If you lose a chick while they are young, you can let one of the watched ones stay around to keep the right number. Do the culling when you are ready to introduce the new chicks (whatever age you do that at.)
If you get chicks, you can also get a few extra chicks, then cull some of them (they are edible at any age, so eating them at quail-size or pigeon-size is fine.) Raising a few extra chicks lets you select the best of them to keep, and compensates for any that die in shipping or when you are raising them. Or if another adult hen dies while the chicks are young, you already have a replacement ready.
I know there is probably a ton of threads but most people situations are a bit different and I haven’t seen any similar. Any help would be appreciated on how to manage rotation. All my previous flocks were all different ages so it worked out. Thanks so much.
Once you have reason to replace some of the hens, you will have a flock with varied ages again, so you will be back to the situation you've had before.