I'm in the EE group..I have ONE, Pearl, that's my escape artist. She's 5 weeks and flew OUT of her brooder box (2-3 feet deep) and about 3 feet into the kitchen in one fell swoop.
Surprised me while I was making lunch.
Now, I have another "flyer" but she's a Buff Orpington, and only really flutters to the top of the box to perch. Pearl has flown onto the fireplace/mantle to watch tv, the coffee table to chase the cat, and into the kitchen to watch me make lunch. She was also the first to start roosting. lol
She's the chick on the left in my profile picture..lol
She looks a lot different now.