Did I make a mistake? Moving chickens around

Today my younger chicks (9 weeks) free ranged again with the older chickens (24 weeks) and all was good. They've seen each other and free ranged together for the last couple months. So, we got home after dark to find ALL the chickens in one of the coops. I removed the younger girls and put them back in their own coop for the night. The coops are really supposed to be for three to four girls. I'll probably have to move them each evening. Is this a mistake? I kinda thought they'd spread out a few to a coop at bedtime or the younger ones wouldn't be allowed in with the bigger ones.

 

We just designed an entire run and spent three weekends building it. There are cutouts for each of our Eglus so there's no way I can build a bigger coop. I think my husband would divorce me. LOL I worry about the little ones still because though they went to sleep together there's still some pecking in the yard and a little chasing (no blood, no relentless attacking) so I thought they were too young to fully integrate. Ugh, should have just bought the bigger model instead of the second smaller model. You know what they say about hindsight!

 

Quote:I will definitely be careful! I'll probably leave the coop door open once the run is totally finished and secure. When I'm home, which is most nights, I'll just have to split them three and three. It's a pain, but I can't afford a bigger coop until next year. I guess the first year of chicken ownership is a big learning experience. Hey, at least they were willing to sleep together. That's a big step!

 

They are in my signature. I have six different chickens. The three older are a Barred Rock, Jersey Giant and Delaware. The three younger girls are a Australorp, Buff Orpington and RIR. They are all pretty friendly except the Delaware is definitely top chicken!