My wife and I purchased 3 barred rock chicks for our granddaughter to enjoy on her visits. We've had fun letting them out of the run to forage and explore the backyard. However, they are now 6 weeks old and flying up to surprisingly high perches. We're getting concerned that they will soon make it to the top of our 6-foot high fence. I know we can't clip flight feathers until they are grown in and there is no blood in them. Should we confine them to their run until we can safely clip feathers? Thanks!