When Chantecler are young, they certainly can and do fly but mine are absolutely free-range. When I open the barn door, they are free to go pretty well where they want. Early evenings, they fly up into the branches of the orchard which is near the house bur that's just to rest and preen before they get their hand full of scratch.
I can honestly say, I have no problems that come to mind, other than the birds being underfoot when they want something. If you start feeding them a snack at certain times of day, they expect it and will come to the kitchen door and demand it. I have a 5 foot fence around my house to keep chickens out but that doesn't stop them if I'm more than 5 or 10 minutes late...I might as well leave the gate open. I have a couple dogs that follow the main flock around during the day that protects them from any predators that could be bold enough to come in during the day. They are white and do stand out and they go far afield so without protection, losses would be high to coyotes and the like but I have a pack of 'night dogs' as well that make such scourges stay away from the main property. Fact is, these night dogs would likely be harder on the chickens than wild animals if the birds weren't locked in solid at night and the about the second chore after milking is locking in those dogs before going into the barns to collect eggs at about 10AM. SO.....I'm hard pressed to find fault with these birds...unless you bring trouble upon yourself like keeping too high a ratio of cockerels.cock birds but even they don't generally fight to the death...they would however breed the hens to death.
Oh...they aren't the best birds on very hot days, like over 90*f but those days are rare in WV but I do have plenty of shade and cold water (with ice) and generally turn on water sprinklers by noon on those very hot days.