Pullet Limping and Toes Appear Curled

[Eggcessive]

Walking on the hock and curled toes are typical of riboflavin (B2) deficiency, but also can be a sign of Mareks disease.

 

[Jessi.Smith]

So, Pecky is still walking the same, but she has no problem keeping up with the other chickens. Another one of the unvaccinated chickens has appeared to lost movement in both of it's legs, to be honest, it looks dead right now, but I sprained my ankle pretty bad and can't walk to the coop without assistance to check (waiting on my hubby to come home to help me). And now, one of my vaccinated chickens is limping.
Can a chicken get Mareks if it has been vaccinated? Should I give them all the vitamins via their water?

 

[Eggcessive]

What brand and type of chicken feed are you using? Are you still using the same vitamin with riboflavin? I would get some vitamins B complex tablets at your Walmart or other stores, and give them each a 1/4 of a tablet crushed onto food daily. You can also dissolve B complex in the water, but I would use 1 tablet per gallon. It is not good to use vitamins with electrolytes for long periods, so just use the B complex.

With so many showing symptoms, I would suspect Mareks. But I would make sure that I was using a good layer or all flock feed that is fresh dated, so vitamins will be fresh. If you lose one, be sure to get a necropsy with testing done by your state poultry vet or lab. The vaccine will not prevent Mareks if they are exposed before immunity is full, after 2-3 weeks of age when vaccinated as a day old chick. So sorry that this may be Mareks. Here is some reading about the disease:
https://www.backyardchickens.com/articles/the-great-big-giant-mareks-disease-faq.66077/

 

[Jessi.Smith]

I feed them all Nutrena Naturewise Chick Grower Starter. I am still doing the vitamin B complex. When they were new chicks I had 2 breeders set up inside, one for the vaccinated and one for the unvaccinated. They stayed indoors until they were 5 or 6 weeks old, then I moved them all out to the coop/run together. They are now about 12 weeks old. I will check the date on the food bags when I get some more next week. I am going to town tomorrow and can pick up some vitamin B capsules.
The chicken that I thought might be dead is not dead, and I saw him fumble to the food container when I was watching them. The vaccinated one that developed a limp today has been moved to a smaller coop, since I noticed he has some feathers plucked out of his head (he is a white crested black polish).
I have a bunch of silkies and show girls that are unvaccinated with no signs and a few more unvaccinated bantams with no signs. Is there a point with Mareks that I know they are all out of danger? It has been 2 weeks now since the first bird started to limp, then Wednesday I noticed the one that can't walk and today I noticed the polish limping.

I appreciate all of your help.

 

[Eggcessive]

It sounds like you are doing all the right things. You are really not going to know for sure this is Mareks until you get a necropsy by your state vet some day on an affected chicken. Mareks can look different in every chicken if affects. Although it usually affects chicken under 25 weeks more common, it can affect any chicken 3 weeks or more after exposure.