http://www.vetguru.com. Castration (Neuter) of a young make dog. There are several techniques that can be used to perform this procedure. In this video the veterinarian uses a single"per-scrotal" incision (in front of the scrotum) during a closed castration: the tunic (skin tissue) is not cut to expose the individual blood vessels and other anatomical parts that need to be ligated (tied off with knot of suture material).