I think the breeding of bantams went a different route to the prolific egg layers and the so called dual purpose breeds.If I thought she was unhappy or in pain it would be a one way trip to the vet but for now, though each day is a struggle for her, she seems content. I've let Oshina out but I have a broody I need to break so she'll still have company @ night. When I'm around to supervise she gets grass time. I hate to make the call too early but it is a fine line to judge.
I find it fascinating that the bantams seem to be much, much hardier ~ even though their genetics have been fiddled with. I've had very few problems with them compared to the standards. Yes they go broody. No, they don't lay every day but on the whole I have found them much easier to deal with. And they cost less to run. I was frightened of the smaller birds to start with but now I'm far more pro them & not so scared of hurting them when I have to handle them.
In the UK bantams were enthusiasts breeds and probably still are.
Bantams are quite difficult to keep if they are not penned. You'll probably remember that Tribe 2, the pro tree huggers were bantams. They're often too flighty and fast for the average keeper to deal with and none of the bantams I've known were that interested in being anyones pet.