With the new variable items in food, and yes while cooking yet again. I had the idea that both of these items could be different and give bonuses to food or what ever based on what animal they came from. Visually those wont change them much (trolls should be colored green why cause there trolls), but add a tag on each stating where it was from. This would mainly affect Liver and Onions and any thing made from stitched casings. Plus if any foods later on need either component as part of the dish.
If anything this is a thought I put out.