Is it really even possible? I'm disheartened. I started with 13 chicks, lost 4 to coccidiosis, lost 6 to mycoplasmosis (ms AND mg!), leaving me with only 3. I got 8 grown hens, lost 1 to unknown causes, and 3 to mycoplasmosis. I got a grown rooster, and he got some kind of respiratory infection, possibly ms. So out of 22 birds I'm down to 7. I know that most people breed for production, either eggs or meat, and ever since the invention of antibiotics and the abundance of medications of all kinds we have now, most people treat sick birds and keep on breeding them. I want my birds to be healthy from the inside out, to not catch every disease that blows their way, and I have read brief mentions of people achieving that goal (by culling every bird that gets sick and only breeding the ones that were naturally immune), but did they start out with a 70% loss in the parent generation? Is there anyone here who has experience breeding for disease resistance, that can give me some advice for trying to get my flock started?