Absolutely, Paramount. It is a very well known fact with many experienced breeders that selection is everything and that even resistance to certain ailments can be selected for. I know guys with chickens who don't treat anything, other than with an ax, it's survival of the fittest with them for the most part. But most people still feel they must worm birds and use preventative coccidiosis medications, guess what, selection has created, and continues to, birds which will show no or very little mortality from coccidiosis and are very resistant/tolerant to internal parasite infestation. This isn't a cure all, by no means, but does go for things all across the board, and it works. I think of it like our birds have to evolve to life on our yards, which are all different, or go extinct, just like in nature. And we become the new and additional environmental force determining what they have to evolve into, and instead of mother nature culling out the fat, lazy, stupid, etc. we now cull all that don't evolve in order to create an adapted population. Sounds crazy or not, it's been happening for centuries.