I’m not a big fan of dogs having their cojones removed that early on. Thining about it, the poor little sod is barely 4 in “human” years and if you did the same thing to a kid, he’d never develop properly.
_If_ (and it’s a really strong “if”) my ESS Ted needs it doing, it will not be until he is 3 or so years old. However, since he has never attacked anything in his life and it’s not in his or his breed’s nature to, I do not think that’s going to be an issue.
I’ve heard stories of other male dogs trying it on with castrated dogs by the way. Apparently it’s quite confusing being a euneuch: not quite male, but not female either.