Grimrock

So i was just feeding my people randomly and suddenly my Ratling Thief got +1 Vitality. After i fed him a piece of cheese.
Tried another but no joy. So either that was some speciel piece of cheese and i didn't notice or ratlings get a bonus from every X cheese!?

Anyone knows details?

I don't have details, but I had a similar experience.
I think it was strength instead of vitality, but I could be wrong. XP

A ratling gets +1 to a random stat after eating three pieces of cheese. (They don't have to be eaten all at once.) The next +1 comes after eating four more pieces; another +1 after five more; etc.