Here's a few pics of a hen culled for wry tail...hers wasn't as bad as some but still pretty distinctive. This hen was not a layer, though young and should have been laying, so thinking she had other issues~ genetically speaking~ as well. You can see how the spine being twisted causes the legs to be offset and crooked also....this hen had a waddling type gait that slowed down her ability to run if out on range, so not good for her survival genetics at all. If out in the wild she would be easily picked off.
Still amazes me how much fat your birds get on them. Our birds are so lean.