I'm starting to think about getting Gus neutered finally. He's 3.5 years and fully mature. My question is, how can I make sure the vet will 'trim up' his scrotum? I've seen male dogs with big empty sacs hanging down and I do not want that for Gus. I'd rather not neuter him than have that, in fact, is how strongly I feel about it. So, do they do that for mature dogs or are the dogs I see who are 'sleek' underneath neutered as puppies?