I too am perplexed by this riddle,days almost weeks on this one.I think I have looked at 100,00 beers.I agree tawny must hint to brown,amberlike ale and omnivoire meaning a type of animal eating both meat and veggies(could be a human also) of course the tawny could describe the color of the animal, what do you think? Au natural perhaps meaning, naked, nude etc.If this is Natural Light Beer I will just scream!! too easy and thats my brand lol.Maybe i could get some help on the south of the border and beyond thing,...two other beers by the same company?I have found a beer named Au Natural but the other clues dont match..Totally appreciate everyones input good luck!!!