Eye infections overnight 3 of 9 have symptoms

[Edgewood Chickens]

My chickens stopped laying about a week ago. No symptoms until today. Two have their eye nearly shut and the third has a discharged. What could this be? I put neosporin on all three tonight and ordered terramycin.

 

[azygous]

It looks like a respiratory infection, probably the most common Mycoplasma gallisepticum. (MG).

Treating the eyes with an antibiotic such as you are already doing is wise. But you probably should also treat with an oral antibiotic such as Tylosin or Amoxicillin.

 

[Eggcessive]

X2 it may be MG (mycoplasma gallisepticum,) a chronic respiratory disease. I would try to get some tylan, denagard, or doxycycline, which can treat symptoms. There can be outbreaks whenever they become stressed, such as during cold weather or molting. Here is some info:
https://thepoultrysite.com/disease-...tion-m-g-chronic-respiratory-disease-chickens
https://extension.umd.edu/sites/ext... Mycoplasma gallisepticum (MG) Infecti....pdf