From The Memsahib: Selective Breeding
Selective breeding of small livestock is important to the survivalist because you will not be able to get replacement livestock from other sources if things get truly bad. You will have to maintain your own breeding population to replace those animal you consume, are killed by predators, die of disease, or even old age. The first principle is that you will keep only a few male animals and a preponderance of female animals. The females of course gestate. The more females you have the more offspring can be produced. You will need some males. You certainly would want to have …