Suggested fix (unconfirmed): Press Windows Key + R, type `%localappdata%low` and press Enter, then navigate to `Naelstrof\KoboldKare`. If the folder still does not exist, ensure you have launched the game at least once and saved a game.
The problem
Where do I find the savegames so I can do a mass delete?
Suggested fix (unconfirmed): Refer to the community guide at https://steamcommunity.com/sharedfiles/filedetails/?id=2861940679 for instructions on making milk-based dishes.
Suggested fix (unconfirmed): Hold K to kill your character, then respawn to apply the new settings. If that forces you to the main menu, return to the game session from there to load the refreshed kobolds.
No confirmed fix yet. Players suggest: I tried throwing the milk on the fruits which just makes them bigger and then I grind it into the bucket of milk but that didn't complete so I can only assume that wasn't what the game wanted.
Suggested fix (unconfirmed): Breed a kobold through 9 or 10 generations of lineage, or raise its belly capacity to at least 160 using heavy modifications and the belly inflator tank.