If you eat just rabbits, nothing else, just lean rabbit meat you will starve to death
It doesn’t matter if you eat 2000 or 10000 kcal of rabbit, if you don’t get more nutritious food, you will die of starvation and your body will waste away.
More calories by itself isn’t a good thing.
Leaded gasoline was peer reviewed and approved. Why don’t you buy some and let your kids play in the fumes?