Added a -a flag to /butcher to kill animals. Its now disabled by default.

src/main/java/com/sk89q/worldedit/LocalWorld.java

@@ -38,6 +38,7 @@ public abstract class LocalWorld {
     public class KillFlags {
         public static final int PETS = 1 << 0;
         public static final int NPCS = 1 << 1;
+        public static final int ANIMALS = 1 << 2;
     }
 
     /**

src/main/java/com/sk89q/worldedit/bukkit/BukkitWorld.java

@@ -33,6 +33,7 @@ import org.bukkit.block.Furnace;
 import org.bukkit.block.CreatureSpawner;
 import org.bukkit.block.Sign;
 import org.bukkit.enchantments.Enchantment;
+import org.bukkit.entity.Animals;
 import org.bukkit.entity.Arrow;
 import org.bukkit.entity.Boat;
 import org.bukkit.entity.Entity;
@@ -500,6 +501,7 @@ public class BukkitWorld extends LocalWorld {
     public int killMobs(Vector origin, double radius, int flags) {
         boolean killPets = (flags & KillFlags.PETS) != 0;
         boolean killNPCs = (flags & KillFlags.NPCS) != 0;
+        boolean killAnimals = (flags & KillFlags.ANIMALS) != 0;
 
         int num = 0;
         double radiusSq = radius * radius;
@@ -511,6 +513,10 @@ public class BukkitWorld extends LocalWorld {
                 continue;
             }
 
+            if (!killAnimals && ent instanceof Animals) {
+                continue;
+            }
+
             if (!killPets && ent instanceof Tameable && ((Tameable) ent).isTamed()) {
                 continue; // tamed wolf
             }

src/main/java/com/sk89q/worldedit/commands/UtilityCommands.java

@@ -345,13 +345,14 @@ public class UtilityCommands {
     @Command(
         aliases = { "butcher" },
         usage = "[radius]",
-        flags = "pn",
+        flags = "pna",
         desc = "Kill all or nearby mobs",
         help =
             "Kills nearby mobs, or all mobs if you don't specify a radius.\n" +
             "Flags:" +
-            "  -p also kill pets.\n" +
-            "  -n also kill NPCs.",
+            "  -p also kills pets.\n" +
+            "  -n also kills NPCs.\n" +
+            "  -a also kills animals.",
         min = 0,
         max = 1
     )
@@ -368,6 +369,7 @@ public class UtilityCommands {
         int flags = 0;
         if (args.hasFlag('p')) flags |= KillFlags.PETS;
         if (args.hasFlag('n')) flags |= KillFlags.NPCS;
+        if (args.hasFlag('a')) flags |= KillFlags.ANIMALS;
 
         int killed = player.getWorld().killMobs(origin, radius, flags);
         player.print("Killed " + killed + " mobs.");