Strange legs on my 7 wk old chick

[ChandraM]

One of my young chicks has weird looking legs. I got her as a day old from Meyer. About 2 years ago I had a brahma that had scaly leg mites, and this does not look anything like that. It started by the ankles on both legs, I noticed it about 3-4 weeks ago, and has progressed since then. It doesn't seem to cause her any discomfort, and she has normal full use of both legs, normal scratching/running/jumping. I haven't been able to find anything that looks like it with my google-fu, so here I am.
Here are pics of Raquel Welsummer's legs:

 

[Isaac 0]

Do you notice any respiratory problems?

It looks like Mycoplsama Synovia.How does the swollen area feel?

 

[ChandraM]

Do you notice any respiratory problems?

It looks like Mycoplsama Synovia.How does the swollen area feel?

It doesn't feel swollen / squishy, and she shows no response when I push, prod, or squeeze the legs.

Edit to add - no respiratory problems, normal appetite for food/water/treats.

 

[Alabama Fly]

Research gout in poultry

 

[Isaac 0]

It doesn't feel swollen / squishy, and she shows no response when I push, prod, or squeeze the legs.

Does it feel hot?

 

[ChandraM]

Does it feel hot?

I don't remember it feeling hot, but I will double check tomorrow when I have light. I just researched MS, and I'll also check for breast lesions.

 

[micstrachan]

Hmmm... I have no idea. It looks uncomfortable, but she does not seem to be having any discomfort? Remember chickens are MASTERS at hiding discomfort. Good luck!

 

[ChandraM]

Ok it gets stranger.
I used a laser thermometer to measure all the chick leg temps, all were within a degree or 2, so that’s fine.
The chick is missing some feathers from one of my big girls going after her last week, but I noticed these white bumps on the back of her head. Shouldn’t be Mareks as they were vaccinated.

I did a pretty thorough check, no breast lesions.

 

[Isaac 0]

Vaccinating against mareks will only help prevent it.It won't totally prevent it.Do you see any mice or lice around her vent?

 

[ChandraM]

No lice or mites. I checked my adults too (except one that just started a hard molt). Nada.