I want to have different gamestages alter the loot drops of different mobs.

I am working on a pseudo-rpg style pack. I want different gamestages to be awarded for doing certain things in the pack. If we use a cow for example, is it possible to remove both leather and raw beef from it's loot table. Then add them back in, but as drops affected by different gamestages. Say.... butcher and skinning.

If you have neither stage, killing a cow is not fruitful.
Butcher stage makes the cow drop raw beef.
Skinner stage makes the cow drop leather.

It is entirely possible to get both Skinner and Butcher stages simultaneously in the pack. Would this then make a cow drop Both raw beef and leather? Or would it only drop the one that was defined first in the loot.json? I am hoping the former for the sake of my pack, lol.