What age to get your dog neutered? and do you think you should or leave them

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So many conflicting views, there too young atm (imo) so you have a few months to think about it anyway.

See i'll put the other side for comparison

Chance IS neutered he was done at about 18 months old, and he is one of the most dominate dogs now i have ever seen/met whatever, he still humps at times, marks everything, certainly hasn't 'calmed' him down and certainly still interested in the ladies