We've have just had Oscar 'done.' Since we got him, on walks his nose would be to the floor, he wanted to run after every bird,squirrel, person! At about 8 months he became quite dominant over other male dogs that hadn't been done and got into a scrap with one in the park that was quite frightening to see as nothing I said would stop him. On walks with the dog walker she said he had started to try and hump the other dogs and suggested we get him done as it may calm him down. Also the scent marking, leads walks were really difficult because of this! I was cautious at first as I'd read so many different things.
Anyways it's been two weeks since and he is much better on a walk, his first class at Doggy school after his Op he was super hyper, but didn't have any issues with the un- neutered males which was nice to see. He hasn't changed much in personality other than he seems to sleep a lot more.
Was it the right thing to do, I think so, has it made an improvement to the humping/dominance issue, havnt yet seen this as we've not been for our usual walks yet as he is still recovering and don't want to over do it until he is properly heeled.
Not sure that's helped, but he seems himself still which was what I was worried about!