Oh no Bakerz...This is terrible news. Is there somewhere around here you can have your birds tested at so you know definitely what you are daling with? They say it is highly contagious from wild birds, local flocks or tracking it home on your car tires, clothes or shoes....Okay here's the deal.
I am absolutely heartbroken at this point.
I believe my flock has contracted Merek's...
I have been doing a lot of research on here lately because some of mine have a sneeze or high pitched cough...I think I am in doo doo too.
I think there are quite a few BYC Members on here with experience with that & a thread on breeding for resistence: https://www.backyardchickens.com/t/894589/moving-forward-breeding-for-resistance-to-mareks-disease
Hugs to you...