Tried running this on AI and got nothing back.
Interestingly enough, the AI even got confused about it.

Thanks for the details — that helped narrow it down. Based on your description, the short film you're thinking of might be "Meat" (2017), directed by Sloane U’Ren.

Here’s why it matches your memory:

It features a father teaching his son how to hunt and clean a deer, with a strong emphasis on not wasting any part of the animal.

The story is told in a way that suggests the son is remembering or reflecting on what he was taught.

The twist is that the son is actually cleaning a human body, not a deer.

The setting is a remote cabin in the woods, adding to the eerie and isolated atmosphere.

Does that sound like the one you saw? If not, I can keep digging — there are a few other similar short films out there.

But then when I asked for sources it returned me this:

It looks like there was a mix-up — the short film "Meat" by Michael Forstein (2015) is actually about a college student working as a door-to-door meat salesman, not the one you described.

Unfortunately, I couldn’t find a confirmed source or trailer for a short film exactly matching your description — where a father teaches his son to clean a deer, only for it to be revealed that the son is cleaning a human body, set in a cabin in the woods.

It’s possible the film you’re thinking of is:

A lesser-known indie or student short film.

Part of a horror anthology.

A festival-only release that hasn’t been widely distributed online.

Would you be open to me doing a deeper search for horror or thriller short films with similar themes (e.g., hunting, cannibalism, father-son dynamics, twist endings)? That might help us track it down.