My 2 males were wethered at the vets under a local. They just cut them like a colt I guess, but it's more comfortable with the local. I don't remember if they even had any stitches. I kinda don't think so. There are 3 ways to wether goats that I know of. Banding, where the band is placed around BOTH testicles and they die and wither away, crushing the cords with a Burdizzo, or something like that, and having them cut. I guess if you cut your own colts, you could do goats the same way? I have no idea. If you have the time and money, I recommend a vet, mainly for your peace of mind!