Cockerel kneeling to eat corn? Has been kept in shed since birth?

My mum has just been given a cockerel and she says it kneels down to eat corn even tho its in an orchard.

I am not sure how old it is, not very old I don't think, but apparently its been kept in a shed since birth.

They think its being in the shed that's caused the kneeling does anyone know why or will he grow out of it?  He's not suffering at all just a bit odd.

Thanks

Check feet and legs for abnormal scales. Chooks will stay down if feet or legs are sore. Can he perch properly and get up and down from perch? Can't do any harm by rubbing legs and feet with vaseline/Savlon.