That's about the half the size of my pen - I will have 10 in there including Jamie, but will get more. As they're allowed out beyond that some of the time I think you could have more than ten, but the size of tehir shed matters too - I was told that my 6 x 4 foot shed was enough fro 10 and I have a second shed in tehre too, which is lower and slightly smaller. Rosemary and chickenlady will know better than me.