Where is that? OMG, Im looking for that damned thing for days.
Game gives zero clue. I killed all in feeding grounds 1 and 2 and got only one half, only half of floor behind the dragon left.

Using the <shift>F8 to display your current location

Feeding grounds, 1st level

@(27,27), carried by throg shaman



Copied and pasted from this guide:
h t t p s : / / gamefaqs.gamespot.com/pc/198812-stonekeep/faqs/1650