I have a 4x6 coop and a 16x16 run. With 11 chickens, and soon to be 16. They have plenty of roost space, it's well ventilated, and I clean it on a regular bases. I know the run is big enough but the coop is a bit small. Would it work if I made the run bigger. I can't make the coop any bigger. They are happy and healthy and get supervised free range time once in a while. There is 8 bovan hens, 1 R.I.R., and a little white bantam. And finally a really protective but not agrassive Americana rooster. I am planning on getting 3 coucoo marans, 1 silver layced wyodotte, and a golden layced Wyandotte. I can make the run bigger but not the coop. They look happy and healthy. I feed them well. Is this to small for 16 chickens, and what would be the max amount.