Seriously would think about having someone back there ASAP with a predator call and a Shotgun with some 00 buck or even a bow if there are houses around. If it was coyotes after a dog that size they need to be delt with. If it was a racoon he probably just got to close. Hope he learned a lesson but if he is anything like my bone headed brown one he will hit the next one just a little harder.

Hard to see him like that. If it was one of mine I would be bumbing hard. Best wishes.
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When Ma Nature decides to make ya her bitch, aint nothin your gonna do about it