Small eye

[Jannisol Sanchez]

All of a sudden one of my button quails eye has gotten smaller. Its not affecting her in any way, she is 2 years old. Does anyone know the cause and if it will go back to normal ?

 

[Eggcessive]

Do you have a picture? Is the light bright? When they are in dimmer light it should get bigger. Does the eye look paler or grey in color? Quail have been know to get Mareks disease I think, but I have never heard of anyone that has dealt with it in quail.