Did you read the link? In it the vet writes:If people don’t want chicks don’t incubate eggs. No need to get a vasectomy for the unwilling bird.
"While I have castrated many birds, some regrettably for behavioral reasons, I now only consider the procedure for medical problems. My experience has been that castration for behavioral modification does not work. This includes attempting to curb aggression in parrots, ducks and poultry and crowing in poultry (chickens and peacocks). The birds temporarily stop their behaviors (probably because the surgery is invasive and they feel rotten) but have all resumed at some point later (some were even checked to make sure there was no remnant regrown testicular tissue). There are actually quite a few studies in various bird species that show the same results- once the behavior is established, castration tends to not make it stop. Some of the studies have even shown increased aggression with castrated birds. Castration would probably be most effective in preventing some behaviors (and normal adult male plumage) when done on young birds. However, I cannot justify the procedure at this time."
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