Hi
I think it would be helpful if you give us the dimensions of your coup and how many chickens you have and a photo of your set up would be good so that we could perhaps advise what modifications could be made to generate more space.
Space in the coup is not just about having room to stand or perch, it's about having personal (chickenal) space. If they feel cramped they can start to pick each others feathers out, eat eggs and other bad habits, you really don't want to develop as they are very hard to break.
What looks fine when they are chicks soon gets crowded as they reach adulthood and sometimes, because you see them every day, you don't realise that things are becoming cramped. Also, many coups are sold as being suitable for more chickens than they actually are. Things are fine until one day they have a falling out and you have bloody, injured chickens and don't think hens can't be as bad as cockerels when it comes to fighting, especially if they have limited space to avoid each other.
"Chicken maths" or addictive flock expansion is a serious condition and to indulge it, you need to make sure you have the facilities to cope, as it can rapidly get out of hand and result in a lot of stress for you and your chickens..... I am speaking from experience here. I had 10 home reared juvenile roosters with raging hormones running around in my mixed free range flock at one stage terrorising my hens. I had to create a batchelor pad pronto to prevent serious injury to two of my favourite hens, who were taking the brunt of their attention.
Good luck with sorting your problem and if we can help with advice/suggestions when we see your coup, I'm sure we will.
Best wishes
Barbara
