Maybe Mareks ??

[mebuff daisy]

One of my 3 month old dark brahamas cannot walk. He was from mmm hatchery and they said he was vaccinated
but I don't know. I got some st johns wart in a bottle w/ dropper but need dosage. the brand is HERB PHARM if that helps.
Thanks,
Ann

 

[mebuff daisy]

Plese help he is getting worse

 

[chicapee]

Plese help he is getting worse 

I hope someone who knows more than m3 comes along to help. First I would isolate from other birds. Keep warm and hydrated. Is he eating and drinking?

 

[chicapee]

Plese help he is getting worse 

How is he doing? Can you describe symptoms?

 

[mebuff daisy]

He is eating and drinking a little, His symptoms are lack of apatite, will not walk at all, pale combs and wattles.I am now not so sure if it is
mereks since it started out as a limp and 2 days later he could not walk.any help at all would be great, thanks

 

[Eggcessive]

Mareks is different in every chicken. The vaccine isn't always successful, and he could have been missed, or exposed before he was fully immune after 2 weeks. How is he lying or sitting? Do you have any pictures? Mareks can start with lameness or paralysis of one or both legs, wings, or the neck. It can then progress to not being able to stand. I would read through the symptoms and the other diseases that can look like Mareks. Do you ever find a dosage for the St.JohnsWort? Posts 18-22 in this thread have dosage that 2 people are using: https://www.backyardchickens.com/t/1018703/maraks/10

Here are some of the best links to read on Mareks:
http://www.thepoultrysite.com/diseaseinfo/90/mareks-disease/
https://extension.unh.edu/resources/files/Resource000791_Rep813.pdf
https://www.backyardchickens.com/a/the-great-big-giant-mareks-disease-faq
http://partnersah.vet.cornell.edu/avian-atlas/#/disease/Marek's_Disease