Adapted from
Todays Tips-The effects of having your dog neutered
In the female it is called spaying and means the removal of the uterus and the ovaries and in the male it is called neutering and is the removal of the testicles. In the female the main change is that the typical behaviour shown during 'heat' and its possible sequel-a 'false pregnancy', will not occur. She will not produce a discharge and she will not attract every male dog for miles. Otherwise the female appears unchanged. In the male neutering reduces roaming in about 90% of male dogs, in about two-thirds it stops aggression between males, and in about 50% it stops urine-marking in the house. There is no evidence that neutering/spaying causes a dog to be less active or reduces its prowess as a guard guide. There may be a greater tendency for a neutered animal to gain weight but this can be checked by reducing its food intake. Spayed females may develop urinary incontinence later, either because of the lack of estrogen or because of a change in the position of the bladder. Surveys show that 10% of females become incontinent.
