If she doesn't, then I can understand the anger, but not the action (overreaction).
Life is a test to prepare us for the next. We are to love our neighbors and forgive trespasses against us.
Shooting the neighbor's dog like that is likely to have some everlasting consequences. Just not worth it. Way too high of a price. Find a better way.
>We are to love our neighbors and forgive trespasses against us.<
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Even if they do not repent after seventy times seven times?