"The Pet" episode #15―When Haskins was bitten―take note of his sleeve

"The Pet" episode #15―After Haskins was bitten―take note of his sleeve

"The Pet" episode #15―When Mark was bitten―looks pre- staged  Cowgirl

When Lucas fights with Haskins in the barn, there's a quick view of an obvious stunt double.  But which one has the double? 
Thanks Rob!