Hi i have a alsation hes 2 yrs old if i had nuted would his behavior get better hes very hyper active and pull

ive allways decided against it hes aggresive towards my wife when we hug but if i get him castrated i dont want him to lose his ability as a guard dog he is also family dog aswell i take him for good walks but he really pulls his ears dont stand upright so im also woorried that he might be inbred please get back to me thankyou