What the hell would you do if your dog killed your other dog?

Mine just did for no damned reason other than sport, and it even ate half of the dead dog.

What the heck should I do now? I have a mind to have it put down now, because if its dumb enough to kill its own kind it might bite a human too.

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For the record I didn't do anything wrong. i've had pets for 40 years since before the girl responding on here was ever born, and I've never had a dog attack another dog.
What the hell would you do if your dog killed your other dog?
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