Neutering is the surgical removal of a male dog's testicles. During the procedure, each of the dog's testes and testicular epididymi are removed along with sections of the dog's testicular blood vessels and spermatic ducts (vas deferens or ductus deferens). The remainder of the male dog's reproductive tract structures, including: the prostate, urethra, penis, bulbis glandis and much of the dog's testicular blood vessels and spermatic ducts are left intact.
Basically, the parts of the male reproductive tract that get removed are those which are responsible for sperm production, sperm maturation and the secretion of testosterone (the major male hormone). Removal of these structures plays a big role in canine population control (without sperm, the dog can not father young); genetic disease control (male dogs with genetic disorders can not pass on their disease conditions to any young if they can not breed); prevention and/or treatment of various medical disorders (e.g. castration prevents and/or treats a number of testicular diseases and testosterone-enhanced medical conditions) and male dog behavioural modification (testosterone is responsible for many male-dog behavioural traits that some owners find problematic - e.g. roaming, aggression, inter-male aggression, dominance, leg cocking - and castration, by removing the source of testosterone, may help to resolve these issues).
View full : Dog neutering
View full : Dog neutering