Odd Eye Color

[rachki]

One of our BR has an odd pupil. I've noticed it before, but never bothered to ask about it as she and the others are all fine.

Any ideas what it could be? Her, and the entire flock are perfectly normal, I'm just curious what could cause it.

Attached images of good eye vs bad

 

[azygous]

That left eye with the shrinking pupil is a classical sign of ocular Marek's.

 

[rachki]

That left eye with the shrinking pupil is a classical sign of ocular Marek's.

Really? That'd odd, I'm assuming Ocular Marek's is different from plain 'ol Marek's?

We haven't had any paralysis, or dead birds in the flock.

 

[azygous]

Marek's comes in many "flavors". https://en.wikipedia.org/wiki/Marek's_disease Not all chickens that carry the virus become symptomatic. Not all die of the disease, either. But those chickens exposed to the disease carry it in their cells for the remainder of their lives.