Quote:Your proposed run size is smaller than people here have recommended.
There was a recommendation earlier for 10² ft per hen. I personally consider that to be too small for the long term. In UK, the recommendation it is often 21² ft (roughly 2² metres) per hen. The legal requirement in UK is actually 43² ft per hen for free range hens.
You are planning to have 8² ft per hen in your run, which is too small according to all of those recommendations.
Your hens currently have 10² ft of run space. If you add another 6 hens, they will have 5² ft of run space. Half of the minimum that they should have. From your photo, it looks like you have brown egg laying hybrids which are quite vicious in general. If you crowd more hens in, they are likely to start eating feathers. Also it looks like one of your hens has diarrhoea.