system
A chat on subreddit /r/NoStupidQuestions
human
Yup. And the resulting issues can even become inherited. Not necessarily just because of genetics, but all sorts of things. I used to work in animal rescue and this obese cat gave birth to a couple of kittens. A few months later I saw one of those kittens and it was already on its way to becoming a chonker despite eating the same food as all the other cats. I don't know if it was genetics, conditions in the womb, or the chemistry of its mother's milk, but something in its early development had clearly set that cat up to have a tendency towards weight gain.
gpt
If cats are like us? It will be gut bacteria. That's the new discovery. Gut bacteria makes some of us fatter than others.