Tutorials/Animal farming

NOTE: This Not Work With Chicken

Steps
You Need: Dirt Cobblestone Grass Dirt with Grass Torch or Glowstone(Used) Trapdoors

Step 1
Put Things like This and put dirt at top of Cobble and Dirt with Grass at Top of Dirt

Step 2
Place Trapdoors at Hole

Step 3
Now Open the Trapdoor

Step 4
To Mobs Spawn, Expand the Top Area

Step 5
Make a Hole at Bottom Part like this at Image

Step 6
Now Place Fence like at Image

Final Step
Put Glowstone(Or Torch) to not Summon Hostile Mobs

But What? The Items Unspawned!

Where is Optional Parts

Optional Parts
You Need: 4 Chests 4 Hoppers

Optional 1
Repeat the Step 5 Like this

Final Optional Part
Put Chests and Hopper like this