Help, chicken with mass/tumor

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Hello all, I'm new here and new to keeping chickens this year. I didn't introduce myself yet because we're having a bit of a crisis. In April of this year, we started with 14 chicks from a few different places - Tractor Supply, Orschlen's, and a private breeder. Around two months ago, we had one of our Speckled Sussex birds turn up sick. She had a mass or tumor on her thigh, that was open and hard to the touch, dry, and not weeping. She developed a couple of other ones and then passed after about a week. This was quite a while ago, at least 6 weeks. Then a couple of weeks later, one of our Barred Plymouth Rocks developed some masses on her face, both sides. We treated her with Vet Rx and Tylan 50 injections, but lost her. Here are some photos of her before we lost her.

Plymouth1.jpg Plymouth2.jpg

Now, our other Speckled Sussex has fallen ill as well. She had diarrhea for several weeks, but she acted okay. We tried electrolyte, probiotics, and yogurt which didn't help the diarrhea. On Saturday morning when I opened the coop, she was sitting on the floor instead of the roost and was unable to walk correctly, when she tried to walk she'd lean forward and almost somersault. We quarantined her inside the house. This morning she was having trouble breathing, so we used Vet Rx and a dose of Tylan 50 orally. Upon closer inspection, she has a mass on the left side of her neck, almost in front of her wing. Here are a couple of pictures.

Mass1.jpg Mass2.jpg
We're not only concerned with this bird, but are worried about what could be happening to our flock. We took the first Speckled to the vet and her thought was that it was getting picked on, but the additional masses came on when she was quarantined. Does anyone have ideas? Do you know what this might be, or anything we could try to save her and protect the rest of the flock? I understand that if this is a disease, this girl could become well again but will possibly be a carrier of whatever she's come down with. She's still eating and drinking, but breathing in through her mouth. I assume we shouldn't introduce her back into the flock if she does get better, no?
 
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Hello I am one year in to backyard chicken keeping. Still new myself. You did not indicate what the vet said when you took em.in my research i find that if I research key words for symptoms I get hits. Have you looked at any viral symptoms in chickens that match yours? I am sorry about your hens. I lost one 3 months ago to impacted crop. What I ahve read about tumors is related to one of 4 viral strains related to Mericks diease but only saw internal tumors. Until you figure out I would recommend separating her from the group in dog crate with food and water in case of what she has is viral which would be contagious to your other birds.
 
And breathing through mouth usually indicates stress or overheated. You could try vitamins and electrolytes by rooster booster or durastat with oregano which indicates helps with energy to stimulate water and appetite during disease xonditinsc, shipping, weather change or stress
 
Thank you for the help! The vet didn't have much experience with chickens and thought it was an injury from pecking, but then other places developed store as well.

We did research this but there are so many different ailments it's hard to know what to do. I guess, to summarize:

Problems walking and standing
Large mass/growth on side
No discernable loss of appetite
No nasal out ocular discharge

Thanks again for the help!
 
Unfortunately my guess would be Marek's disease. It would be best to get a necropsy done to confirm or otherwise when you are losing more than one bird in similar circumstances. The age of these birds, the time scale between outbreak of symptoms in each bird, getting chicks from different sources (particularly a private breeder) and that they have no appetite loss (at least initially) and the respiratory distress, all point to Marek's.
Your state agricultural or veterinary diagnostics lab should be able to perform a necropsy and do the relevant (PCR) testing for Marek's. A bird needs to be refrigerated (not frozen) as soon as it dies and sent off to the lab.... double bagged and overnight postal service on ice is usually required or delivered to the lab in person. Most labs have a website with a price list and contact details. This service is often subsidised because poultry are part of the food chain, so it can be relatively inexpensive. Some labs require samples to be sent via a vet which unfortunately incurs additional expense, but enquiring with them in advance will help you be prepared for what needs to be done next time you lose one.
Unfortunately once tumours develop there is little hope, so if you have one with tumours it might be kinder to euthanize and get the testing done sooner than later.

I'm so sorry you are dealing with this. I too have Marek's in my flock and it is pretty heart breaking at first but hopefully the majoriity of your birds will be resistant to it.... if indeed it is Marek's and things will settle down a bit after these initial outbreaks. Good luck!
 
Thank you for the advice. This afternoon we called the state vet and discussed what's going on, and it is likely Marek's. What a way to start keeping chicks. It sounds like we're in for a ride. We'll see how many make it through, and will hopefully continue to have a flock.

A couple of interesting things to note on this:
- The state vet advised us that we could contact the state university for autopsy and verification of the virus, and the university would know to report to the state if Marek's was present. The university indicated that the state wouldn't need to know about Marek's, only fast-acting high mortality diseases like avian flu.
- I'm convinced that we brought the virus in from a breeder we visited when our flock was just a couple of weeks old. We went to look at birds and talk chickens in general, and found out that this breeder was "tired of losing birds to Marek's". Not knowing anything about Marek's, we were unaware that we should have washed all our clothes and showered before handling our chicks. I wish they would have told us.
- The show circuit is apparently infested with this disease. The breeders said you can't go to a county fair without being exposed. I'm glad we don't plan to show. The breeders are continuing to show their exposed birds.
 
I'm so sorry for ur loss I'm sure that she's having LL (Lymphiod Leukosis)
This virus is a kind of tumor causing cancer come from mom to chick or bird to bird contact and very possible in young age when it's serve
This virus is very cruel and kill the bird
Sadly there's no treatment avail most of the bird lost their life
Having birds from reputated Hatcher mypetchickens.com like are good

There are a logic in that some people let their pullet hatch egg .
When a pullet hatch egg theirs 90% chances if she had any strain of Leukosis Chick will be infected

Once a Hen (approx 2 year old) hatch egg theirs 1% chances of infection

So buying chicks from a big hatchery will help sometimes
 

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