For this reason, keeping her away from unaltered male dogs is essential. (dogcare.dailypuppy.com)
Intact male Miniature Bull Terriers tend not to tolerate prolonged association with other unaltered male dogs. (petwave.com)
Altered male dogs and cats are less likely to engage in frustrating urine marking behaviors, and tend to be less aggressive; the vast majority of serious dog bites are inflicted by unaltered male dogs. (petallianceorlando.org)