See, that term “I would think” rubs contrary to statistical tests conducted at research farms.

The process that you are asking makes no sense to a farm that wants to “grow” a chicken by a few pounds to get the meat.

Identifying infected animals from no infected, segregating them, and then monitoring them needs manpower and equipment that they don’t have. And not interested in purchasing.

And then you have doubts for any asymptomatic infected chickens. This is an industry that feeds humans. No one takes that level of risk. No one.

An analogy is the old Windows xp era habit of wiping the hard drive instead of “finding” and isolating the virus. Companies that relied on data being their service, have back up chickens that get replaced instantly to keep the production line going.