Thank you for sharing that info. I was about to bring up the same issue... I have read conflicting information on these threads about chicks who recover passing on immunity vs. the recovered ones having chicks and passing on the virus again (like a never-ending cycle). It seems very logical that they would pass on the immunity. And as we have seen here in our batch several chicks who have been in and around the infected feces have not exhibited any signs of the virus. We have to assume (as science leads us) that the parents had some sort of immunity for some of these chicks.
It is a hard decision to make. But I want to cast my opinion for not culling the remaining healthy or recovered chicks. We are planning to keep ours and watch how things progress over the next year.
Would it be fair then to assume the way it gets passed on is from an infected chick who is not past the point of full recovery from the virus, spreads it to an adult hen and she in turn shows no signs but carries the virus secretly for several weeks and in that time lays eggs to be hatched which then starts the virus in a new batch of chicks???
It is a hard decision to make. But I want to cast my opinion for not culling the remaining healthy or recovered chicks. We are planning to keep ours and watch how things progress over the next year.
Would it be fair then to assume the way it gets passed on is from an infected chick who is not past the point of full recovery from the virus, spreads it to an adult hen and she in turn shows no signs but carries the virus secretly for several weeks and in that time lays eggs to be hatched which then starts the virus in a new batch of chicks???