If it helps Vonny, the only time I ever hear someone say 'vittles' is in old black & white cowboy movies. Usually someone like Gabby Hayes would say 'help yerself to sum vittles, boys.
Ah ... cowboy films. Why don't they make them any more - or do they? I do remember 'vittles' in that context. John Wayne, James Stewart and Charlton Heston spring to mind ...
I honestly can't say, I was a kid when I saw the original and enjoyed it as a kid. I enjoyed the Coen brothers' one just as much, but as an adult. And there was a tiny bit of the Big Lebowski about this Rooster Cogburn that I loved.