Gelding - especially doing so early on - leads to soundness in the legs?

[_ed_]

It's done a lot in this part of the world - well over 50% of the male horses racing in NZ are gelded.

Of course, that's partly because the good colts are retired earlier, but the majority are geldings even from a young age. The NZ Derby this year, for example, had four colts, four fillies and 10 geldings.