Our old cat was large, long, lean, often got remarked upon, the vet called him panther, he once got mistaken for a dog by a visiting tradesperson. He ate well and was very active until near the end, so I'm used to large cats. He died last year and we now have a kitten.
Kitten is 5.5 months old, eats Royal canin dry kitten food and one wet pouch split over the day, usually Blink, Applaws, Lily's Kitchen, Hi life, seriously good a la carte etc, so those with decent content not just jelly and ash. He demolishes everything put in front of him, he will stand and eat all of his biscuits at once like a dog does. I know there's supposed to be no such thing as over feeding a kitten but he's starting to look a little chunky around the hips 😁
He doesn't go out yet, I can't shake the advice given when I had my first which was to keep them in until six months, and also he is an absolute daredevil/lunatic climbs curtains, shins down the bannister, hares around the house like a whirlwind. He has no fear (also loves water) and when we've taken him into the garden with us he has no recall, even before a meal, so I really worry about him coming back. He is clicker trained indoors. He can give a paw, has plenty of toys and mental stimulation, a cat tower etc, we play with him every day. He is half Bengal if that makes a difference.
I don't want him getting overweight and that having health implications. He meows for food even when fed.