I repeat myself, but…
Without knowing your version and mods, we can’t help. Please provide the necessary information and you might want to read through this external site so you can report bugs more effectively. Otherwise, this will just turning into a guessing game and waste both our time, as well as some others on this forum.
If butchering is the problem, check this…:
Note that the saw and other tools can’t be in use by multiple NPCs at the same time.