This thread is a little old but so relevant as it does seem Marek's is ubiquitous. I thank the OP and all the rest for such invaluable information!
Would it be correct to say that once a chickens shows signs of what is very likely Marek’s that it’s unlikely the chicken will recover? That a slow or fast decline is probable? What I’m getting at is if a chickens shows unmistakable signs of Marek’s is it perhaps better to cull sooner rather than delay the inevitable for a few days or a week? The rest of the flock is still compromised but perhaps there’s less overall stress on both the flock and the owner with a faster cull decision?
Would it be correct to say that once a chickens shows signs of what is very likely Marek’s that it’s unlikely the chicken will recover? That a slow or fast decline is probable? What I’m getting at is if a chickens shows unmistakable signs of Marek’s is it perhaps better to cull sooner rather than delay the inevitable for a few days or a week? The rest of the flock is still compromised but perhaps there’s less overall stress on both the flock and the owner with a faster cull decision?