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Well not exactly...You would never intentionally expose them to anything...You simply cull the weaker birds that seem to be more susceptable to say coccidiosis or high worm loads and use your healthier, seemingly more resistant birds, as your foundation for a breeding program. Resistance in your foundation herd is more talked about in the goat, cow, sheep, pig, larger animal species...but the same principles can apply to chickens/poultry, as well.
Well not exactly...You would never intentionally expose them to anything...You simply cull the weaker birds that seem to be more susceptable to say coccidiosis or high worm loads and use your healthier, seemingly more resistant birds, as your foundation for a breeding program. Resistance in your foundation herd is more talked about in the goat, cow, sheep, pig, larger animal species...but the same principles can apply to chickens/poultry, as well.