Im not sure about the Hyborian Age, but I’m pretty sure most civilizations around that time had animal husbandry before they started growing crops.
I was thinking, since some of the areas I like best to build, have zero food sources other than bugs, a crafting station, a small animal pin, housing a deer, sheep, or something. It’s just part of the crafting station for looks, that way no one can keep killing it.
The fuel (feed) is plant fiber, and it yeilds hide, fur, meat and compost. Quality depends on the tier of animal pin.