The more dogs I see at my clinic the more I think keeping males intact as long as possible is a great idea as long as the owner can keep them from reproducing unless intended to!. .
The intact dogs I see, males anyway, are more healthier with less care it seems in general. They generally stay thin and make it into old age more gracefully with less intervention for arthritis because they have been thin their whole lives. Just truly seem to be healthier overall. Less metabolic diseases. I just saw a 14 yr old Chessie who's 75-80 lbs and one of the healthiest dogs of that size and age I've ever seen. Just now having some issues with arthritis, he otherwise looked great. I do see some intact male dogs who for sure are not healthy but its more straight genetic type stuff or lack of care.....missing half their hair due to fleas, heart murmurs from a young age, stuff like that. See very little testicular cancer although I have seen a number with prostate disease, typically benign enlargement and infections. There are always exceptions and you can't improve on general genetics by keeping intact but the more I see the more I think I'm just going to leave my own male intact for a good while.As this statement came from a vet, I have to ask for specifics!
WHAT exactly are you seeing in neutered males that you are not liking?
Agreed. My Rottweilers, who were both neutered at 1 year, both marked and humped. Luckily never in the house.Humping and marking are more behavioral