I'm now worried about Mareks. I have a bantam cochin who is 5 months old that has leg issues, she topples off to the side because she isn't using her left leg. Took her to the vet today and he isn't sure. He said to try steroids and clavamox. If this doesn't help in a week she will probably need to be put down. If this happens, he said necropsy is in order to see what it was.
I'm very worried. He couldn't find anything wrong and said it seems neurological. DIdn't act like he thought it was mareks but didn't rule it out 100%.
I got all of my 8 chickens from breeders on here. None were vaccinated. My thoughts are, if the people I got my birds from (only 3 people) have not had mareks, could my girl have it? I don't have chickens anywhere around where I live that I know of.
Yes-- mine came in from the environment. As the primary means of transfer is in chicken dander (which can be tiny particles), it can blow in on the wind for many miles, or be transferred by migratory wild birds. We had a strange migration pattern in wild birds last year and I suspect that's where the Marek's on my property came from.
If it isn't mareks, can I vaccinate my older birds? They are all around the same age 5 months, give or take a little. if it is mareks, I guess they are all exposed and carriers now. Can a bird carry it and not get it?
You can, but it is very questionable if it will do any good. It is generally thought that the vaccine really only helps day-old chicks when administered before they are 36 hours old, and then kept away from Marek's virus for at least 6 weeks (longer is better) to develop a resistance. It won't hurt them to vaccinate when they are 5 months old, but it is unlikely to help- especially if they have been exposed. If your poor hen tests positive, then you can assume any chickens that have lived with her or been near or on areas where she has been in the last several weeks have been exposed. Birds can carry it and not show symptoms, yes.
I'm very upset as these are my first chickens, my first year with them. I hope that Penny just hurt herself somehow and this will get better but I fear the worst case scenario.
Is there a test they can do for it? he checked for coccidia, but that was clear.
They can do a gross necropsy after death, which will examine her body for obvious signs (such as systemic tumors/lymphoma that is seen in the visceral form of Marek's). If no tumors are present, or of you want to be fully sure, blood can be sent to a few different labs for testing. Many people here have sent blood samples to Texas A&M for testing. This blood test can be done on live chickens without harming them if you or a vet is able to do the blood draw properly and can send the sample off. I think it's around $40 plus shipping but please don't quote me on that-- my memory is foggy. I'll dig up the link if you are interested. A blood test via DNA searching for virus markers is the only "for sure" way to know if it's Marek's if visceral tumors are not present. Tumors do not always form, depending on how Marek's shows within the bird.
If it were to be from mold (doubt it, but never know), could she improve? if her leg is getting paralysis, can that reverse?
Paralysis can improve depending on the cause. Even Marek's paralysis has improved in some people's hens, though they usually end up losing the bird months later. However, if it is a deficiency-- yes! She can improve for sure. There are several vitamin deficiencies that can cause paralysis in chickens. I'll see if I can find a link for you...