Neutering will not make him healthier. It will reduce the risk of testicular cancer which is rare in dogs, it increases the risk of prostate cancer, hemangiosarcoma, and osteosarcoma (bone cancer). The last two can affect young dogs and the prognosis is very poor. Testicular cancer has a good prognosis. I would neuter only if the dog had an issue with those parts. But, lots of dogs are neutered without any side effects, or cancer down the road. We are talking increasing risks, from like 1% to 2.5% or something like that, they are all still only a risk.
With dogs (males), removing the hormones can affect behavior. It can make training somewhat easier. It is not a cure-all, it must be accompanied by regular/consistent training, socialization, and management.
Jenna, RN CGC & Babs, CD RA CGC HIC
Heidi, RA CGC
SG3 Odessa, SchH1, Kkl1, AD
Ninja, RN CGC & Milla, RN CGC
Joy, Star Puppy, RN CGC
Dolly CGC & Bear CGC