--- ../work/decompile-bb26c12b/net/minecraft/server/PathfinderGoalSilverfishWakeOthers.java	2014-11-27 08:59:46.841421230 +1100
+++ src/main/java/net/minecraft/server/PathfinderGoalSilverfishWakeOthers.java	2014-11-27 08:42:10.144850927 +1100
@@ -36,6 +36,11 @@
                         IBlockData iblockdata = world.getType(blockposition1);
 
                         if (iblockdata.getBlock() == Blocks.MONSTER_EGG) {
+                            // CraftBukkit start
+                            if (org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(this.silverfish, blockposition1.getX(), blockposition1.getY(), blockposition1.getZ(), Blocks.AIR, 0).isCancelled()) {
+                                continue;
+                            }
+                            // CraftBukkit end
                             if (world.getGameRules().getBoolean("mobGriefing")) {
                                 world.setAir(blockposition1, true);
                             } else {