my parlors pretty much get on fine, except when left to get up high and they jump off and just roll down till they hit something, but then again they seem to have denser bones due to many hundreds or more generations of being bred to roll around on ground and not fly past months old. the one winger should be fine as long as it can have branches to gradually walk or hop down from every spot it could get up to, to ground. keeping it isolated inside for too long can produces similar bad behaviours like parrots get. maybe at least get it a friend to keep it company inside in 20' to 40" high 40" high length rabbit cage then.