--- /home/matt/mc-dev-private//net/minecraft/server/EntityMushroomCow.java	2015-02-26 22:40:22.639608139 +0000
+++ src/main/java/net/minecraft/server/EntityMushroomCow.java	2015-02-26 22:40:22.639608139 +0000
@@ -1,5 +1,7 @@
 package net.minecraft.server;
 
+import org.bukkit.event.player.PlayerShearEntityEvent; // CraftBukkit
+
 public class EntityMushroomCow extends EntityCow {
 
     public EntityMushroomCow(World world) {
@@ -24,6 +26,14 @@
         }
 
         if (itemstack != null && itemstack.getItem() == Items.SHEARS && this.getAge() >= 0) {
+            // CraftBukkit start
+            PlayerShearEntityEvent event = new PlayerShearEntityEvent((org.bukkit.entity.Player) entityhuman.getBukkitEntity(), this.getBukkitEntity());
+            this.world.getServer().getPluginManager().callEvent(event);
+
+            if (event.isCancelled()) {
+                return false;
+            }
+            // CraftBukkit end
             this.die();
             this.world.addParticle(EnumParticle.EXPLOSION_LARGE, this.locX, this.locY + (double) (this.length / 2.0F), this.locZ, 0.0D, 0.0D, 0.0D, new int[0]);
             if (!this.world.isClientSide) {