This is a common questions veterinarians are asked. Unfortunately there is not a lot known about how altering the sexual status of a male dog affects their long-term behaviors. A good retrospective study looked at dogs who were neutered early and found that the following behaviors may improve:
- separation anxiety
- escaping behaviors
- inappropriate elimination when frightened
- and relinquishment for any reason
This same study also found that the following behaviors may get worse:
- noise phobias
- sexual behaviors
If anyone is considering surgically altering their pet for behavior reasons, they should have a discussion with their veterinarian about the probability of the surgery helping as well getting advice on alternate solutions for dealing with the behavioral issue of concern.
In the study mentioned above early neutering was anywhere between the ages of 6 weeks and 1 year.