--- ../src-base/minecraft/net/minecraft/item/ItemLead.java
+++ ../src-work/minecraft/net/minecraft/item/ItemLead.java
@@ -10,6 +10,8 @@
 import net.minecraft.util.AxisAlignedBB;
 import net.minecraft.world.World;
 
+import org.bukkit.event.hanging.HangingPlaceEvent; // CraftBukkit
+
 public class ItemLead extends Item
 {
     private static final String __OBFID = "CL_00000045";
@@ -61,8 +63,26 @@
                     if (entityleashknot == null)
                     {
                         entityleashknot = EntityLeashKnot.func_110129_a(p_150909_1_, p_150909_2_, p_150909_3_, p_150909_4_);
+                        // CraftBukkit start
+                        HangingPlaceEvent event = new HangingPlaceEvent((org.bukkit.entity.Hanging) entityleashknot.getBukkitEntity(), p_150909_0_ != null ? (org.bukkit.entity.Player) p_150909_0_.getBukkitEntity() : null, p_150909_1_.getWorld().getBlockAt(p_150909_2_, p_150909_3_, p_150909_4_), org.bukkit.block.BlockFace.SELF);
+                        p_150909_1_.getServer().getPluginManager().callEvent(event);
+
+                        if (event.isCancelled())
+                        {
+                            entityleashknot.setDead();
+                            return false;
+                        }
+
+                        // CraftBukkit end
                     }
 
+                    // CraftBukkit start
+                    if (org.bukkit.craftbukkit.event.CraftEventFactory.callPlayerLeashEntityEvent(entityliving, entityleashknot, p_150909_0_).isCancelled())
+                    {
+                        continue;
+                    }
+
+                    // CraftBukkit end
                     entityliving.setLeashedToEntity(entityleashknot, true);
                     flag = true;
                 }