On balance, it appears that no compelling case can be made for neutering most male dogs, especially immature male dogs, in order to prevent future health problems. (homevet.com)
Immature females, on the other hand, showed lower rates of object manipulation, especially in play, but displayed a much greater diversity of manipulation types than males — such as biting, breaking or carrying objects — rather than the play - based repetition seen in the object manipulation of immature males. (sciencedaily.com)
Australasian Evolution Society Talk: «Sexual conflict in juveniles: exposure to immature males reduces asexual performance in the spiny leaf stick insect» 2017 (nathwilliamb.com)