General rule of thumb is 4sq ft per bird in the coop, 10 sq ft in the run. How big is your coop? Where they roost? They need roost space too to avoid squabbling. Minimum for 14 IMO would be 2 8' roosts at the same height. A lot depends on weather too. 10X30 as a rule is good for 30 chickens, but there are so many variables. Will they be locked up all winter? Look through the threads. There are tons of great conversations to help you decide. Keep the questions coming. One way isn't the only way. I hope you get great input.