we built a 10x16 ft run, 6 ft high, and attached to it is a sleeping hutch, its total area for them to sleep in is 7x2.5 ft, 3 ft high. if i run two 7 ft perch's from end to end a foot and half high, how many birds is that enough room for comfortably??? right now we have 17 chickens, 4 are roos, so they're coming out eventually. which leaves us with 13 pullets. they're all happy, but they're just 5 weeks old and can still fit nice. we're willing to cull down a few if necessary, but how much could we fit comfortably in a 7x2.5x3 ft sleeping space??? all of them, or less some??? the more we can keep the better.