Our skunks go after bugs and worms, dog and catfood are favorites too. They are omnivores, but not something that would go after such a relatively large animal. Maybe mice also, kittens maybe. They are not fighting animals, although they can if required.
Edited to add: a weasel animal might do this, or a raccoon maybe as they will go for the neck. Weasels will kill and kill and kill, then just eat what they want and leave the rest.