When do you castrate your wethers?

[Nanno]

I used one of my pack wether boys as a breeding buck before he was wethered at nine or ten months. We didn't have any issues. He did continue to spray whenever he got too excited for about six or eight months after he was wethered. We had to be careful not to let him get overly hyper while training and especially when he was meeting strangers out in public. He never blubbed, swatted, or did any other mating behaviors at people, but he would liberally spray anything within a four-foot radius if he was too happy. The one somewhat negative thing that happened was that he got very attached to the girls. When he was a youngster he loved nothing better than to go walking with me and Phil. After breeding, however, he became more emotionally attached to the herd and to this day is rather reluctant to leave his girls behind (although he has improved with time).