diff --git a/build.properties b/build.properties
index ca32897..08284b2 100644
--- a/build.properties
+++ b/build.properties
@@ -12,4 +12,4 @@ forge_version=12.18.1.2064
 # simply re-run your setup task after changing the mappings to update your workspace.
 mcp_mappings=snapshot_20160820
 
-chisel_version=0.0.6.38
\ No newline at end of file
+chisel_version=0.0.6.33
\ No newline at end of file
diff --git a/src/main/java/com/github/atomicblom/shearmadness/proxy/CommonProxy.java b/src/main/java/com/github/atomicblom/shearmadness/proxy/CommonProxy.java
index b552e78..bd75252 100644
--- a/src/main/java/com/github/atomicblom/shearmadness/proxy/CommonProxy.java
+++ b/src/main/java/com/github/atomicblom/shearmadness/proxy/CommonProxy.java
@@ -76,6 +76,10 @@ public void onAttack(AttackEntityEvent event)
             return;
         }
 
+        if (!sheep.hasCapability(CapabilityProvider.CHISELED_SHEEP, null)) {
+            return;
+        }
+
         event.setCanceled(true);
 
         Chiseling.chiselSheep(sheep, entityPlayer, activeStack);