do you know for a fact that "he" killed the duck?
It's rather a natural thing to chase, catch, kill. I have chickens even tho my dogs have been subjected to them since they were day olds, My aussies would just LOVE to chase one, pounce on it, and kill it , by accident or otherwise.
My shepherd is fine with them, but I wouldn't leave her alone unattended with them
Danger Danger vom Kleinen Hain aka Masi
"Angel" Jakoda's Bewitchen Sami CD OA OAJ OAC NGC OJC RS-O GS-N JS-O TT HIC CGC
"Angel" Steinwald's Four x Four CGC HIC TT
Harmonyhill's Hy Jynx NA NAJ NAC NJC RS-N JS-N HIC
Jakoda's Jagged Edge