What animal is being cooked/prepared/diseccted in this classical painting?

This painting

What the… that looks like a very small horse.

A lamb or kid, maybe?

Kid’s my guess, looking at the hooves and head.

It’s a normal size horse, those are just gigantic people.

It’s an eohippus. That painting is old.

Googling up “skinned goat” it appears you are most likely correct.

How to skin a goat

You win the thread. \m/

They’re celebrating Passover, so almost certainly lamb.

Dressed lamb carcass.

Newborn lamb.

Dressed sheep.

I think it’s the baby from Eraserhead

Doctors aren’t even sure it is a baby.

Looks like a rabbit to me.

Sampiro’s completely right-- it’s at least supposed to be a lamb.

It’s so tiny it would have to be a fetus.

Ewe.