My thought: hundred percent carnivore diet. Seneca is two years, eight months old, and he loves “kibbeh”, which is essentially super mini burger patties made out of ground beef, 100% grass fed. Easy to cook on the frying pan or even in an air fryer! The secret is make them really really small.
Funny enough, he even enjoys eating it cold!
I think this is the secret of him growing up and becoming so big and strong!
Also a new pro tip; in the early days, feed them bone marrow! This is essentially what demigod like Achilles was fed. Also, for milk, I believe goats milk to be the best. I read this from an ancient Roman book on animal husbandry!