KiNgBrAdLeY7: Then why is there a different category of dry food, specifically for sterilized cats?
Because of marketing and to sell things, a desexed animal has no specific nutritional requirements.
Dog food companies are the worst with their "specially formulated for labradors" and so on, it's all nonsense.
Check the ingredients and it's all basically the same (they do similar with some human products also).
And if these companies were so concerned about nutrition, they'd stop selling pet food with grain-based fillers.
Dogs and cats are carnivores, they don't need a lot of carbs and grains cause allergies and skin issues.
KiNgBrAdLeY7: Besides, hormones activity is naturally altered (after sterilization) and this brings changes, to at least the behavior of the animal.
Don't know about cats, not a kitty person, but with dogs there is absolutely no evidence that castrating males stops them from roaming, fighting or controls their behaviour.
Plenty of castrated males who will still scale fences to mate or to fight with other dogs.
Jake is intact and doesn't fight unless challenged, yet he was attacked by two male dogs, both castrated.
And castrated dogs have a higher incidence of prostate and bladder issues.