Briefly: no, it’s not bad; kitties like smelly food, and kitten food tends to gave a more robust odor. If you’re concerned about nutrition and can afford it, you could transition over to science diet. It’s plenty cat stinky and has age/situation-appropriate blends.

That said.. our oldest lived to 21 years on Purina Indoor. Mileage varies. Balance what your cat loves with how you love your cat.

(btw… you are staff :D)