Seems like it would make livestock breeding a whole lot easier if it were possible to spay or neuter cows/sheep which have bad genetic material to keep them from breeding. It would make management of livestock breeding much easier, rather than requireing two separate pens for cows and bulls, and keeping a very close eye on which cow breeds with which bull (which probably means a separate breeding pen as well, and individual breeding sessions). This would especially come into play when players have large heards which are difficult to keep fed, much less making sure only the proper breeding occurs.
Obviously nothing critical, but might not be a bad idea.