The rabbit starvation thing is played up too big, probably due to Les Stroud's show , it goes like this......
Rabbits, especailly in the far north reaches, is totally lean meat, has no fat.
They tend to call deer a lean meat, but it does have some small amounts of fat, just is much much leaner than beef.
So, way back in the day, up north , the new arrivals to that frozen region, would get rabbit starvation.
BUT, it's from ONLY eating rabbit, and nothing else, for periods of up to 30 days or even far longer. Without any kind of fat in your diet, you'll actually starve, very very slowly though.
Add some nuts, and you get your needed fat. Add a few fish and you get the fat you need to keep going. So really, unless we plan on living up north, in snow country, and ONLY subsisting on rabbit, and rabbit alone, we've got very little to worry about.
Now here is a puzzlement for ya.... how can a fur bearin critter, from far north territory not have any fat in it's meat? You would think that the farther north, and colder it gets, the more fat an animal would have to keep warm? I don't know why this is, it just makes me wonder.