This is a personal decision that requires you do some research and not just listen “to your brother’s friend’s uncle who is a vet”.

Current research is compiled here:

An Update on the Health Effects of Spay/Neuter in Dogs

Long-Term Health Effects of Neutering Dogs: Comparison of Labrador Retrievers with Golden Retrievers

Neutering: This Common Procedure Can Boost Cancer and Joint Problems As Much As Five-Fold

Contrary to popular belief, you do not HAVE TO spay/neuter your dog. As long as you a a responsible dog owner not allowing unwanted/unplanned litters!! It is YOUR decision, not mine, not your vet’s, etc.