Neutering, and prong collars

[tz1]

Thanks for the warm welcome everyone. I have no pictures that are on my computer, except one, when he was around 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.