I have chickens that can fly a little. In my case it is great ti have free ranging chickens who are able to flee from dogs and other predators during day-time.
I have a covered run of 15m2 (10’ x 15’?) for my small bantams. If necessary they can stay in the coop+run whole day. When nobody is at home they stay inside. If possible we let them free range a few hours each day.
The run has predator-bird netting on top and proven to be safe for 5 years now. To keep the chickens in and keep predators out (during daytime).
P.s. I love my chickens. No reason not to want Dutch bantams or naine de Tournaisis in the future. The Dutch are friendlier, the Tournaisis are better layers. Because I am curious I prefer trying another bantam breed next year. Reading about silkies and polish I definitely wont buy fertile eggs of those feather balls.