>>3881503According to this calculator if you give Gorou a pound of milk chocolate he can eat it without significant illness
But if you give him a pound of dark chocolate he’ll get sick enough to be hospitalized
And if you give him a pound of cacao he’ll become deathly ill
https://www.msdvetmanual.com/pages-with-widgets/clinical-calculators?mode=listSo you just have to do bait and switch and get him used to milk chocolate candies and then one day give him dark chocolate and he collapses