This is a tough decision for every dog person. I lost two dogs when I was kid because they were out and about doing what comes naturally. Hit by cars. My wife had an uncut Lab, who was an escape artist, when I met her. Spent a lot of time chasing after that dog and money getting him sewn up. That could be your downside depending on your dog's temperament. Got my current pup cut at about nine months, Harley is pushing five now and is fine. Excellent bird dog. Some advocate that a male dog is stronger and develops better physically if not cut. Probably some truth in that. I will advise you not to let him near a dog in heat, once they get started you may have trouble convincing him not to indulge. Even if castrated after the fact the term 'cut proud' comes to mind. Having a dog who is not cut will complicate things if there is dog in heat around as they will be distracted once they get the scent. Can't blame them for that. Depending on your living situation also. Beau, (the uncut 90lb Lab) was not fun to walk as he would go after other males if there was a dog in heat in the vicinity ( a very large vicinity). Always on leash in any situation except in the bush where I knew there were no other dogs around. This is a worse case scenario, not all dogs are as dominant as Beau was. Keep in mind that if your pup has his testicles he may not mind you.