Just an update on the situation here. Today I lost another roo from my 'control' group. As I said before, these birds were hatched in Oct. from Marek's survivor's eggs. I started with 9 mixed chicks and 1 showgirl chick. I have lost 2 roos from this bunch. One at about the 10 week mark and then today to what I believe was a heart attack. There has also been the loss of one of these chicks' mother, not part of the group.
The rooster was fine and up until this morning, when doing chores, noticed him huddled under the hanging feeder, assumed he had been being picked on by the 2 other roos in the cage with him. Brought him into my house and offered feed and water. Refused both and was just sitting on the floor and showed some deep breathing as if he was under stress. Left him be except to speak quietly to him. After a couple of hours he squawked once and fell over and was gone before I could get to him.
It is my belief that even though these birds have gone beyond the 10 week mark and haven't shown any symptoms, the Marek's is still inside them working. Maybe there were all of the normal markers inside this poor guy. It's too late in the week to send him for necropsy and I'm too sick myself to do a home version. I could keep him over the weekend but would still have to call for an appt. Monday and no idea how long that could take. It's never easy. His keel bone was very slightly prominent but nothing like a 'normal' Marek's wasting. No occular changes at all and comb and wattle were nice and red. No skin involvement and no signs of paralysis at any time. No clue. The rest of the 7 birds in this group [the showgirl is a house bird] appear to be doing great. Good weight, no prominent keel bone, poop is normal, as is appetite. No lethergy or any other discernable problems at all. I have been getting one egg from this group, probably from the white Golden Comet mutt. The others should be starting in the next few weeks as well. They do have one roo out in the room with them so the eggs should be fertile and I will be trying for another hatch from these. I have no idea where this is going to take me in the end, but at this point all I can do is go forward and share what I see and find out from necropsy or whatever.
If this seems harsh and unfeeling to some, I am sorry. Bottom line, I have Marek's here and nothing is ever going to be 'nice' again, unless I choose to cull everyone and start over. I think about this everyday, but when I look at my birds I just can't do it. Even if I did go the culling route, there is no guarantee it wouldn't come back from contact with wild birds or from the land.