My sheep were attacked by dogs the other day. I didn't see the dogs but I recognized the tracks. A huge german shepherd at least 125lbs but probably a lot bigger, and possibly his mate, another shepherd. The only thing that would have been worse would have been more dogs. I need a guard animal.Any suggestons? Right now the shepherd is penned up. If he ever gets loose somebody may get the chance to shoot it. Untill then I need to defend against it.So what could win aginst a pair of really big shepherds? Thanks.