diff --git a/src/main/java/net/minecraft/server/EntityCreature.java b/src/main/java/net/minecraft/server/EntityCreature.java
index 801b64ad7d..98afd9cdc7 100644
--- a/src/main/java/net/minecraft/server/EntityCreature.java
+++ b/src/main/java/net/minecraft/server/EntityCreature.java
@@ -5,6 +5,9 @@ import java.util.Random;
 // CraftBukkit start
 import org.bukkit.craftbukkit.CraftServer;
 import org.bukkit.craftbukkit.entity.CraftCreature;
+import org.bukkit.craftbukkit.entity.CraftEntity;
+import org.bukkit.event.entity.EntityTargetEvent;
+import org.bukkit.event.entity.EntityTargetEvent.TargetReason;
 // CraftBukkit end
 
 public class EntityCreature extends EntityLiving {
@@ -27,12 +30,37 @@ public class EntityCreature extends EntityLiving {
         float f = 16F;
 
         if (d == null) {
-            d = l();
+            // CraftBukkit start
+            Entity target = l();
+            if(target != null) {
+                EntityTargetEvent event = new EntityTargetEvent(this.getBukkitEntity(), target.getBukkitEntity(), TargetReason.CLOSEST_PLAYER);
+                CraftServer server = ((WorldServer) this.l).getServer();
+                server.getPluginManager().callEvent(event);
+                if(!event.isCancelled()) {
+                    if(event.getTarget() == null) {
+                        d = null;
+                    } else {
+                        d = ((CraftEntity) event.getTarget()).getHandle();
+                    }
+                }
+            }
+            // CraftBukkit end
             if (d != null) {
                 a = l.a(((Entity) (this)), d, f);
             }
         } else if (!d.B()) {
-            d = null;
+            // CraftBukkit start
+            EntityTargetEvent event = new EntityTargetEvent(this.getBukkitEntity(), null, TargetReason.TARGET_DIED);
+            CraftServer server = ((WorldServer) this.l).getServer();
+            server.getPluginManager().callEvent(event);
+            if(!event.isCancelled()) {
+                if(event.getTarget() == null) {
+                    d = null;
+                } else {
+                    d = ((CraftEntity) event.getTarget()).getHandle();
+                }
+            }
+            // CraftBukkit end
         } else {
             float f1 = d.a(((Entity) (this)));
 
diff --git a/src/main/java/net/minecraft/server/EntityMobs.java b/src/main/java/net/minecraft/server/EntityMobs.java
index df910e41d5..e75b345c3d 100644
--- a/src/main/java/net/minecraft/server/EntityMobs.java
+++ b/src/main/java/net/minecraft/server/EntityMobs.java
@@ -5,10 +5,13 @@ import java.util.Random;
 // CraftBukkit start
 import org.bukkit.craftbukkit.entity.CraftMonster;
 import org.bukkit.craftbukkit.CraftServer;
+import org.bukkit.craftbukkit.entity.CraftEntity;
 
 import org.bukkit.event.entity.EntityDamageByEntityEvent;
 import org.bukkit.event.entity.EntityDamageEvent;
 import org.bukkit.event.entity.EntityDamageEvent.DamageCause;
+import org.bukkit.event.entity.EntityTargetEvent;
+import org.bukkit.event.entity.EntityTargetEvent.TargetReason;
 // CraftBukkit end
 
 public class EntityMobs extends EntityCreature implements IMobs {
@@ -57,7 +60,22 @@ public class EntityMobs extends EntityCreature implements IMobs {
                 return true;
             }
             if (entity != this) {
-                d = entity;
+                // CraftBukkit start
+                org.bukkit.entity.Entity bukkitTarget = null;
+                if(entity != null) {
+                    bukkitTarget = entity.getBukkitEntity();
+                }
+                EntityTargetEvent event = new EntityTargetEvent(this.getBukkitEntity(), bukkitTarget, TargetReason.TARGET_ATTACKED_ENTITY);
+                CraftServer server = ((WorldServer) this.l).getServer();
+                server.getPluginManager().callEvent(event);
+                if(!event.isCancelled()) {
+                    if(event.getTarget() == null) {
+                        d = null;
+                    } else {
+                        d = ((CraftEntity) event.getTarget()).getHandle();
+                    }
+                }
+                // CraftBukkit end
             }
             return true;
         } else {
diff --git a/src/main/java/net/minecraft/server/EntityPigZombie.java b/src/main/java/net/minecraft/server/EntityPigZombie.java
index f22ea2f04f..18e768ec33 100644
--- a/src/main/java/net/minecraft/server/EntityPigZombie.java
+++ b/src/main/java/net/minecraft/server/EntityPigZombie.java
@@ -5,7 +5,10 @@ import java.util.Random;
 
 // CraftBukkit start
 import org.bukkit.craftbukkit.CraftServer;
+import org.bukkit.craftbukkit.entity.CraftEntity;
 import org.bukkit.craftbukkit.entity.CraftPigZombie;
+import org.bukkit.event.entity.EntityTargetEvent;
+import org.bukkit.event.entity.EntityTargetEvent.TargetReason;
 // CraftBukkit end
 
 public class EntityPigZombie extends EntityZombie {
@@ -82,9 +85,24 @@ public class EntityPigZombie extends EntityZombie {
     }
 
     private void g(Entity entity) {
-        d = entity;
-        a = 400 + W.nextInt(400);
-        b = W.nextInt(40);
+        // CraftBukkit start
+        org.bukkit.entity.Entity bukkitTarget = null;
+        if(entity != null) {
+            bukkitTarget = entity.getBukkitEntity();
+        }
+        EntityTargetEvent event = new EntityTargetEvent(this.getBukkitEntity(), bukkitTarget, TargetReason.PIG_ZOMBIE_TARGET);
+        CraftServer server = ((WorldServer) this.l).getServer();
+        server.getPluginManager().callEvent(event);
+        if(!event.isCancelled()) {
+            if(event.getTarget() == null) {
+                d = null;
+            } else {
+                d = ((CraftEntity) event.getTarget()).getHandle();
+                a = 400 + W.nextInt(400);
+                b = W.nextInt(40);
+            }
+        }
+        // CraftBukkit end
     }
 
     protected String e() {
diff --git a/src/main/java/net/minecraft/server/EntitySpider.java b/src/main/java/net/minecraft/server/EntitySpider.java
index 1d1c746c01..77bd7eb4d3 100644
--- a/src/main/java/net/minecraft/server/EntitySpider.java
+++ b/src/main/java/net/minecraft/server/EntitySpider.java
@@ -4,7 +4,10 @@ import java.util.Random;
 
 // CraftBukkit start
 import org.bukkit.craftbukkit.CraftServer;
+import org.bukkit.craftbukkit.entity.CraftEntity;
 import org.bukkit.craftbukkit.entity.CraftSpider;
+import org.bukkit.event.entity.EntityTargetEvent;
+import org.bukkit.event.entity.EntityTargetEvent.TargetReason;
 // CraftBukkit stop
 
 public class EntitySpider extends EntityMobs {
@@ -52,8 +55,19 @@ public class EntitySpider extends EntityMobs {
         float f2 = b(1.0F);
 
         if (f2 > 0.5F && W.nextInt(100) == 0) {
-            this.d = null;
-            return;
+            // CraftBukkit start
+            EntityTargetEvent event = new EntityTargetEvent(this.getBukkitEntity(), null, TargetReason.FORGOT_TARGET);
+            CraftServer server = ((WorldServer) this.l).getServer();
+            server.getPluginManager().callEvent(event);
+            if(!event.isCancelled()) {
+                if(event.getTarget() == null) {
+                    this.d = null;
+                } else {
+                    this.d = ((CraftEntity) event.getTarget()).getHandle();
+                }
+                return;
+            }
+            // CraftBukkit end
         }
         if (f1 > 2.0F && f1 < 6F && W.nextInt(10) == 0) {
             if (A) {