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According to this...http://www.livestrong.com/article/429395-nutritional-facts-on-alligator-meat/Alligator meat has 46g of protein per serving (3.2 oz / 100g). Not bad, plus it's pretty tasty.
I have killed and cooked up rattlesnake before, the croc seems like it would be a better meal.
I once tried alligator meat on a cracker.....not bad at all!