It can also go the other way, especially with very small coops that are really only used for roosting.Technically yes but the thing is birds who share a space together tend to want to roost together so you may run into overcrowding issues anyways. I'd find a used shed and convert it to a coop, cheaper and better than buying a new coop
I have a group of older pullets at the moment that happily mix together or go off in different combinations during the day time but are very particular about who they'll roost with. They sleep in three or sometimes four different places and one of the smallest and youngest likes to roost with the older, much larger girls who are already laying. Often she tucks herself in between two that I'd describe as the most dominant and the least friendly. Sometimes the sleeping arrangements change either for a night or two, or as an ongoing thing. Most of the spaces they use could easily fit more birds if they all wanted to be together.
Even with coops that are being used as living space during the day in bad weather, I'd not necessarily see it as an issue unless the weather is so bad they can't even make a quick dash from one coop to another.
