I wrote an article called "On Meat Alone" some time back with historical documentation to back it up. In a long term wilderness living situation, especially in the cooler parts of Australia, it is I think reasonable to expect to be eating more meat than anything else. My purpose was to show that this is possible.
Here is some more interesting info on this subject: In 1940, two German Geologists escaped nazi Germany & hid in the African desert, this was Henno Martin & Hermann Korn. They lived on mostly meat for two years with no problems, until Hermann Korn started to suffer from a vit B deficiency & had to turn themseves in to the African authorities. They gleaned a lot more insight from their two year stay in the desert, & it makes good reading, even if it is not the main story. This info can be found in the book "The Tiger" by John Vaillant. This book is worth reading.