Well this is what I have learned from this site and others and books and 3 vets.Waiting to get them neuterd does increase the muscle size,The testostirone contributes to muscle growth,but it also increases growths to cancer cells and tumers that may not be noticable also.I was wanting my Boxer to get as Big as a horse,But he is family,So neutering is going to happen.I talked to the vet about size.Well just because testosterone wont be present just basic good strong daily activities will add size,just like pumping iron at the gym.Good diet and exersize is going to be my way of getting him Big.(also heard that they get bigger afterwards too)People talk about traits of unneutered dogs(marking his area,humping,wondering to find females,Bla,Bla),My only reason I would ever get it done is because of females going into heat and my dog SDS-my way of saying Sudden DEAF syndrome.But learning of the high possabilities of Boxers getting cancer in several places and Tumors,Is why I am going to do it.I know it won't prevent them If the man up stairs decides different,But it sure increases the odds of him NOT getting it.
I just hope it does not take the spunk out of him or make him passsive.He is so friendly as it is.But will not back down from a dog,Of course he has yet to get that close to one,But he sure acts like he would eat'em up,Who knows he might just play with them,Just like when the door bell rings he barks kinda mean,Until they enter and I talk to them and then it is all good with him.or take him to the store and he thinks he has to greet everyone he meets,It is funny he will talk them right over to him,Mouns and growns and kinda growels and yelps at them to get there attention.
I personely hopes he gets a little more leary of people and becomes more protective of his family(exspecialy for my wife she would like to start walking at night after dinner).Right now if he goes to the store and I run in and my wife stays in the car and I say watch'em protect mommy he reacts to anyones movement VERY aggressivly,Only thing is he stands over top of her doing it and it makes her mad when I say it,I get a kick out of it myself-LOL.Or if he hears a noise outside at night he stands over us and acts all mean and then will run and stand over our son in bed and growels-Then smells under both sides of the bed and then comes back to bed ,Like you mess with this little dude you come threw me first.I just hope that stays intacked after the neutering.
Well this is my 2 cents worth thanks for listening and I can relate with people not wanting to neuter but just way it all out for this breed of dog and you will do the right thing-Neuter !!Just my opinion.