castration period for oxen

I castrate them early, very – at a week to a month old
they never know they miss anything;
I would castrate them, depending on what I want; the later the more Bull-like the animal – statue and behaviour – the earlier, the larger the animal (supposedly 😉 )
the urinary tract itself won’t run into any problems, no scientific proof for any problems; the connecting tissue however between prepuce and penis will not break down when castrated early, thus preventing extention of the latter

Breed may affect ideal castration age, as well as intent. If you have a large, slow growing breed but are not going into competition pulling, you might castrate later than if you have a smaller, faster growing breed and want to maximize adult size.