Hi D L M-
I wouldn’t say there is a specific food that neutered dogs do better on than the other. Some choose to use lower calorie foods, since neutering/spaying decreases metabolism. I think the most important thing to think about when feeding an altered dog vs an intact dog is calories. Most pet parents will not adjust the dogs daily caloric intake when they neuter or spay the dog. That is what causes the weight gain.
I’ve had great success using the Dog Food Calculator tool on the homepage of this website. For your dog I would choose the option “Senior, Neutered, Inactive” for activity level.
/dog-feeding-tips/dog-food-calculator/
