diff --git a/Plugins/Libraries/craftbukkit.jar b/Plugins/Libraries/craftbukkit.jar
index 1a85cd1e6..e17af7127 100644
Binary files a/Plugins/Libraries/craftbukkit.jar and b/Plugins/Libraries/craftbukkit.jar differ
diff --git a/Plugins/Nautilus.Core.CraftBukkit/src/net/minecraft/server/v1_6_R3/EntityCreature.java b/Plugins/Nautilus.Core.CraftBukkit/src/net/minecraft/server/v1_6_R3/EntityCreature.java
new file mode 100644
index 000000000..38358d4c8
--- /dev/null
+++ b/Plugins/Nautilus.Core.CraftBukkit/src/net/minecraft/server/v1_6_R3/EntityCreature.java
@@ -0,0 +1,315 @@
+package net.minecraft.server.v1_6_R3;
+
+import java.util.Random;
+import java.util.UUID;
+import org.bukkit.craftbukkit.v1_6_R3.CraftServer;
+import org.bukkit.craftbukkit.v1_6_R3.TrigMath;
+import org.bukkit.craftbukkit.v1_6_R3.entity.CraftEntity;
+import org.bukkit.event.entity.EntityTargetEvent;
+import org.bukkit.event.entity.EntityTargetEvent.TargetReason;
+import org.bukkit.event.entity.EntityUnleashEvent;
+import org.bukkit.event.entity.EntityUnleashEvent.UnleashReason;
+import org.bukkit.plugin.PluginManager;
+
+public abstract class EntityCreature extends EntityInsentient
+{
+  public static final UUID h = UUID.fromString("E199AD21-BA8A-4C53-8D13-6182D5C69D3A");
+  public static final AttributeModifier i = new AttributeModifier(h, "Fleeing speed bonus", 2.0D, 2).a(false);
+  public PathEntity pathEntity;
+  public Entity target;
+  protected boolean bn;
+  protected int bo;
+  private ChunkCoordinates bq = new ChunkCoordinates(0, 0, 0);
+  private float br = -1.0F;
+  private PathfinderGoal bs = new PathfinderGoalMoveTowardsRestriction(this, 1.0D);
+  private boolean bt;
+
+  public EntityCreature(World world)
+  {
+    super(world);
+  }
+
+  protected boolean bJ() {
+    return false;
+  }
+
+  protected void bl() {
+    this.world.methodProfiler.a("ai");
+    if ((this.bo > 0) && (--this.bo == 0)) {
+      AttributeInstance attributeinstance = getAttributeInstance(GenericAttributes.d);
+
+      attributeinstance.b(i);
+    }
+
+    this.bn = bJ();
+    float f11 = 16.0F;
+
+    if (this.target == null)
+    {
+      Entity target = findTarget();
+      if (target != null) {
+        EntityTargetEvent event = new EntityTargetEvent(getBukkitEntity(), target.getBukkitEntity(), EntityTargetEvent.TargetReason.CLOSEST_PLAYER);
+        this.world.getServer().getPluginManager().callEvent(event);
+
+        if (!event.isCancelled()) {
+          if (event.getTarget() == null)
+            this.target = null;
+          else {
+            this.target = ((CraftEntity)event.getTarget()).getHandle();
+          }
+        }
+
+      }
+
+      if (this.target != null)
+        this.pathEntity = this.world.findPath(this, this.target, f11, true, false, false, true);
+    }
+    else if (this.target.isAlive()) {
+      float f1 = this.target.d(this);
+
+      if (o(this.target))
+        a(this.target, f1);
+    }
+    else
+    {
+      EntityTargetEvent event = new EntityTargetEvent(getBukkitEntity(), null, EntityTargetEvent.TargetReason.TARGET_DIED);
+      this.world.getServer().getPluginManager().callEvent(event);
+
+      if (!event.isCancelled()) {
+        if (event.getTarget() == null)
+          this.target = null;
+        else {
+          this.target = ((CraftEntity)event.getTarget()).getHandle();
+        }
+      }
+
+    }
+
+    this.world.methodProfiler.b();
+    if ((!this.bn) && (this.target != null) && ((this.pathEntity == null) || (this.random.nextInt(20) == 0)))
+      this.pathEntity = this.world.findPath(this, this.target, f11, true, false, false, true);
+    else if ((!this.bn) && (((this.pathEntity == null) && (this.random.nextInt(180) == 0)) || (((this.random.nextInt(120) == 0) || (this.bo > 0)) && (this.aV < 100)))) {
+      bK();
+    }
+
+    int i = MathHelper.floor(this.boundingBox.b + 0.5D);
+    boolean flag = H();
+    boolean flag1 = J();
+
+    this.pitch = 0.0F;
+    if ((this.pathEntity != null) && (this.random.nextInt(100) != 0)) {
+      this.world.methodProfiler.a("followpath");
+      Vec3D vec3d = this.pathEntity.a(this);
+      double d0 = this.width * 2.0F;
+
+      while ((vec3d != null) && (vec3d.d(this.locX, vec3d.d, this.locZ) < d0 * d0)) {
+        this.pathEntity.a();
+        if (this.pathEntity.b()) {
+          vec3d = null;
+          this.pathEntity = null;
+        } else {
+          vec3d = this.pathEntity.a(this);
+        }
+      }
+
+      this.bd = false;
+      if (vec3d != null) {
+        double d1 = vec3d.c - this.locX;
+        double d2 = vec3d.e - this.locZ;
+        double d3 = vec3d.d - i;
+
+        float f2 = (float)(TrigMath.atan2(d2, d1) * 180.0D / 3.141592741012573D) - 90.0F;
+        float f3 = MathHelper.g(f2 - this.yaw);
+
+        this.bf = ((float)getAttributeInstance(GenericAttributes.d).getValue());
+        if (f3 > 30.0F) {
+          f3 = 30.0F;
+        }
+
+        if (f3 < -30.0F) {
+          f3 = -30.0F;
+        }
+
+        this.yaw += f3;
+        if ((this.bn) && (this.target != null)) {
+          double d4 = this.target.locX - this.locX;
+          double d5 = this.target.locZ - this.locZ;
+          float f4 = this.yaw;
+
+          this.yaw = ((float)(Math.atan2(d5, d4) * 180.0D / 3.141592741012573D) - 90.0F);
+          f3 = (f4 - this.yaw + 90.0F) * 3.141593F / 180.0F;
+          this.be = (-MathHelper.sin(f3) * this.bf * 1.0F);
+          this.bf = (MathHelper.cos(f3) * this.bf * 1.0F);
+        }
+
+        if (d3 > 0.0D) {
+          this.bd = true;
+        }
+      }
+
+      if (this.target != null) {
+        a(this.target, 30.0F, 30.0F);
+      }
+
+      if ((this.positionChanged) && (!bM())) {
+        this.bd = true;
+      }
+
+      if ((this.random.nextFloat() < 0.8F) && ((flag) || (flag1))) {
+        this.bd = true;
+      }
+
+      this.world.methodProfiler.b();
+    } else {
+      super.bl();
+      this.pathEntity = null;
+    }
+  }
+
+  protected void bK() {
+    this.world.methodProfiler.a("stroll");
+    boolean flag = false;
+    int i = -1;
+    int j = -1;
+    int k = -1;
+    float f = -99999.0F;
+
+    for (int l = 0; l < 10; l++) {
+      int i1 = MathHelper.floor(this.locX + this.random.nextInt(13) - 6.0D);
+      int j1 = MathHelper.floor(this.locY + this.random.nextInt(7) - 3.0D);
+      int k1 = MathHelper.floor(this.locZ + this.random.nextInt(13) - 6.0D);
+      float f1 = a(i1, j1, k1);
+
+      if (f1 > f) {
+        f = f1;
+        i = i1;
+        j = j1;
+        k = k1;
+        flag = true;
+      }
+    }
+
+    if (flag) {
+      this.pathEntity = this.world.a(this, i, j, k, 10.0F, true, false, false, true);
+    }
+
+    this.world.methodProfiler.b();
+  }
+  protected void a(Entity entity, float f) {
+  }
+
+  public float a(int i, int j, int k) {
+    return 0.0F;
+  }
+
+  protected Entity findTarget() {
+    return null;
+  }
+
+  public boolean canSpawn() {
+    int i = MathHelper.floor(this.locX);
+    int j = MathHelper.floor(this.boundingBox.b);
+    int k = MathHelper.floor(this.locZ);
+
+    return (super.canSpawn()) && (a(i, j, k) >= 0.0F);
+  }
+
+  public boolean bM() {
+    return this.pathEntity != null;
+  }
+
+  public void setPathEntity(PathEntity pathentity) {
+    this.pathEntity = pathentity;
+  }
+
+  public Entity bN() {
+    return this.target;
+  }
+
+  public void setTarget(Entity entity) {
+    this.target = entity;
+  }
+
+  public boolean bO() {
+    return b(MathHelper.floor(this.locX), MathHelper.floor(this.locY), MathHelper.floor(this.locZ));
+  }
+
+  public boolean b(int i, int j, int k) {
+    return this.br == -1.0F;
+  }
+
+  public void b(int i, int j, int k, int l) {
+    this.bq.b(i, j, k);
+    this.br = l;
+  }
+
+  public ChunkCoordinates bP() {
+    return this.bq;
+  }
+
+  public float bQ() {
+    return this.br;
+  }
+
+  public void bR() {
+    this.br = -1.0F;
+  }
+
+  public boolean bS() {
+    return this.br != -1.0F;
+  }
+
+  protected void bF() {
+    super.bF();
+    if ((bH()) && (getLeashHolder() != null) && (getLeashHolder().world == this.world) && this.PullWhileLeashed) {
+      Entity entity = getLeashHolder();
+
+      b((int)entity.locX, (int)entity.locY, (int)entity.locZ, 5);
+      float f = d(entity);
+
+      if (((this instanceof EntityTameableAnimal)) && (((EntityTameableAnimal)this).isSitting())) {
+        if (f > 10.0F) {
+          this.world.getServer().getPluginManager().callEvent(new EntityUnleashEvent(getBukkitEntity(), EntityUnleashEvent.UnleashReason.DISTANCE));
+          unleash(true, true);
+        }
+
+        return;
+      }
+
+      if (!this.bt) {
+        this.goalSelector.a(2, this.bs);
+        getNavigation().a(false);
+        this.bt = true;
+      }
+
+      o(f);
+      if (f > 4.0F) {
+        getNavigation().a(entity, 1.0D);
+      }
+
+      if (f > 6.0F) {
+        double d0 = (entity.locX - this.locX) / f;
+        double d1 = (entity.locY - this.locY) / f;
+        double d2 = (entity.locZ - this.locZ) / f;
+
+        this.motX += d0 * Math.abs(d0) * 0.4D;
+        this.motY += d1 * Math.abs(d1) * 0.4D;
+        this.motZ += d2 * Math.abs(d2) * 0.4D;
+      }
+
+      if (f > 10.0F) {
+        this.world.getServer().getPluginManager().callEvent(new EntityUnleashEvent(getBukkitEntity(), EntityUnleashEvent.UnleashReason.DISTANCE));
+        unleash(true, true);
+      }
+    } else if ((!bH()) && (this.bt)) {
+      this.bt = false;
+      this.goalSelector.a(this.bs);
+      getNavigation().a(true);
+      bR();
+    }
+  }
+
+  protected void o(float f)
+  {
+  }
+}
\ No newline at end of file