Livestock Yield Boost lets you multiply how much your animals produce every game hour: eggs, wool, milk, manure and slurry each have their own independent multiplier, from x1 to x100.

Adjust the multipliers from the general settings menu.

Works in singleplayer and, if you are hosting the game, in multiplayer too: connected players don't need to do anything, the boosted production is calculated by the host and applies to everyone.