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From Diary of a Wimpy Kid Wiki
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Name Killer
Gender Unknown, Probably Male
Age Unknown
Actor None

Killer is a large, black dog owned by Joe Heffley. He appears in Dog Days.


On Greg's birthday in June, in Dog Days, Killer ate some of Greg's birthday cake, and then threw up the candles underneath the table. Instead of throwing the whole cake away, Susan Heffley just cut away the parts that the dog didn't touch, ruining the birthday experience for Greg.