I had my boy Nelson neutered just undr 2 years of age. He was fine until one year old, but then he REALLY suffered with various in heat bitches in our neighbourhood. Within one month of neutering him, I was sure this was the best decision. he never had a problem recalling away from an in heat bitch and he had a better quality of life as he didnt suffer when bitches came into heat.
My Nelly was a poodle cross and after neutering him his coat did get thicker - I preferred it personally

I have a bitch now currently on her first heat, and this will certainly be her last. I feel terrible taking away her fun walks and off lead and do not wish to have to do this again!