I have provided these links to Slash Key (the game developer) for you the Farmer
to gain a better understanding of "Animals" available in the game & their uses.
FOR DETAILED INFORMATION ON FACILITY ANIMALS
|You are currently allowed 250 Animals of each type in all Animal Facilities,
except for 500 allowed in the "Super Animal" Facilities. Farm Cash animals produce 30 times more products.
Farm cash animals in a "Super Building" produces 60 times more products.