No one should feel guilty about possible Marek's disease, it can truly happen to anyone. Most have birds that have not been vaccinated. Many flocks are a mix of purchased birds that may be vaccinated, and home hatches that are mostly not. Marek's can come from wild birds, or from new birds brought in. Some strains are very mild and flock losses will not be huge, other strains are much more virulent and losses can be much higher. There are many people who have Marek's in their flocks and it's just dealt with. Many are raising birds and breeding for resistance rather than vaccinating. There is some debate about the vaccine since it doesn't actually prevent the disease, it just prevents them developing the tumors. In the last 6 months I have two birds that may have developed occular Marek's. I'm just watching them for now. I've never had a case in 10 years, and these will be my first, if that's what it is. I have never brought in new birds except 1-3 day old chicks. It happens. Marek's is much more common than many people realize. Hopefully that is not what this is with yours. I would do some vitamin supplementing, the B's in particular, and some E, since vitamin deficiencies can cause some odd neuro-muscular symptoms sometimes. And there are other conditions/diseases that can have similar symptoms to Marek's. I have a 6 year old rooster with an odd head twitch, definitly neurological, no known cause. He's had it since he was about 6 months old. I hope yours does OK, but if you do lose him, then a necropsy is your best resource for knowing for sure what caused it. 


