Been sitting on this idea for some time and I really hope it's worth hearing out.
Food mobs as it stands don't respawn and must be bred. I like this system a lot and don't want to see it changed.
But I'd like to open up the idea of "huntable" mobs. These are mobs that will drop meats, but unlike the aforementioned system for farm animals, they spawn and despawn randomly, much like the current system for Ocelot spawning. Hunt animals can't be bred and should be more skittish from the player.
My thoughts would be to add:
Deer (perhaps Antelope varients for Savannah)
Wild Boar (perhaps it could fight back?)
With many many more opportunities and even biome inclusive species (imagine the potential for savannah wildlife?)
To balance the game, I think farm animals could be a little bit rarer, but not too much so.
Thank you. I hope this idea resonates well with the community and developers. :)