my idea involving Minecraft fauna

Hello, my name is Leon, my gamertag is: DemonicKitten22, my idea for Minecraft is to make variations of the main animals, just like the rabbit, the cat, the panda, the axalot, It's also like in this update, the wolf! To be more exact, they should add varieties of sheep, cows, pigs and chickens, varying the biomes, it would be optimized, after all it is just a change of texture, and it would greatly enrich the environment.