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Calvin has a nice 'possum scar on his muzzle from ... though, because he was almost entirely covered with tooth marks.

"It's like being pecked to death by ducks." What kind of dog is Calvin? Most dogs I've seen that hunt kill pretty quickly. I've got Siberian Huskies and they eat what they kill - everything but the head.

Calvin is an ACD (blue heeler).
Maybe it has to do with firsts and the fact that it was a very large opossum. I estimated about 20 pounds. His first rabbit and mole catches he carried around half dead for quite a while. Since then he crunches and eats them as soon as he catches them. Fortunately he hasn't tangled with any other 'possums since.
And I think he loves the heads. Those must be his favorite part because he usually saves them for last.