Quote Originally Posted by tz1
6 weeks old.

I have a couple concerns about getting Zero neutered. Hope this doesn't sound too silly... Will his energy levels decrease? Will he get fat? Will he be timid and afraid of strangers instead of the confident, attentive, and protective? Will it really decrease the chance of testicular cancer? (I heard from a dog trainer that this was not true)

Basically, I'm afraid that he won't be the same dog after the surgery.
Dogs get fat for the same reason people do--too much food, not enough exercise. His weight has nothing to do with getting neutered. If he gets enough exercise, he won't get fat. His temperment won't change, except he'll be less inclined to roam and fight with other male dogs. I've had dogs neutered at every age from six months to 6 years....never saw a change in their personalities.

Neutering elminates testicular cancer. Neutering removes the testes. You can't get cancer in what you don't have! It greatly reduces the chances of prostate problems.