Spawn at a plant called wheat, can be milked.
When killed, can drop goat fur or goat meat.
Maybe there can be a way to tame and ride the goats with your cavepeople, maybe even a chariot for multiple goats carrying people.
I’m thinking goat fur can be made into a fur coat, but I’m considering making an entire clothing thread.
Perhaps you can cook goat steak with the goat meat.