A dislocated tail bone will cause inability to stay balanced while walking or standing. The obvious solution would be to undergo surgery or whatever can be done to fix it. The coccyx can be fixed in some non-surgical cases, although it is highly dependent on the injury's severity.
Dislocated?
dislocation or a subluxation or a disarticulation
The joint has been dislocated.
a tail bone
it may be at weird angle if they broke it and if you feel the tail you will feel a lump or a gap
Try an osteopath and physiotherapist
The bone that supports the tail feather bone is the scrodum or the dick
The bone in a horse's tail is called the Dock. It goes from the top of the tail, to about mid-tail or shorter.
bone
tail bone
The generic term for a bone that is displaced at the joint is "luxated". A partially dislocated joint may be called subluxated.
That is the tail bone.