So, we've recently acquired 2 new cats in our household on top of our existing resident. the previous resident is young and healthy, and pretty normal.
however the 2 newcomers are ex laboratory cats, so they've been used to being stuck in a cage with a daily feeding ritual and not much else.
so they can't regulate their eating, so you need to give them servings, but the previous cat is used to just having a full bowl and eating when he wants (and he can maintain a healthy weight)
our solution is his food bowl is now up on a shelf that only he can jump up to, bit unconventional but it works, and this is where my idea comes from- why not do this to humans?
I didn't find the right solution from the Internet.