You know, your mention of gardening just made my brain turn in a different direction in thinking of this. I'm thinking of seed savers and people who develop hyperlocal strains of a given variety that do the very best in their yard/area - and this is seen as a very good thing, as it leads to lots of variety with regard to pest/disease resistance, heat or cold resistance, or thriving in salty soil (and therefore more resilience in the face of serious threats on a wider scale, re: severe weather, climate, or pest/disease outbreaks). See Irish potato famine for reference.
Indeed this is what we all should be doing for our own birds in our own flocks - and, by default, we do (hopefully), because we select those who do well. For instance, all of mine will ultimately be selected to do well in this hot hot climate (meat birds will grow well, layers will lay well), and to be alert and run for cover when an aerial predator approaches. This leads to overall increased robustness PROVIDED there is mindful selection. Letting everyone have babies regardless won't get you very far, and too many "crutches" would be problematic as well (which I will struggle with - how long do I provide overhead protection, what losses am I willing to accept - I will need to develop more vegetative cover before leaving them open and exposed to hawks, though).
I think the reason I'm so irritated about the CL situation is that I had always planned to do this work with the Naked Neck flock, but hadn't really anticipated a second "project" to work on the CLs. More work (though if it bothers me this much, I suppose I should put my money where my mouth is...)
- Ant Farm