sick layers again

[TJ Hatchery]

My hens have a gargling when breathing swelled eyes or can't get there eyes open at all. Treated 2 months ago for same problems with tetracycline hydrochloride soluble powder and it seemed to work. Last time they didn't have the eye problems. Any sujestions to what it might be. Been trying to put a pic of one of the hens but it hasn't been working.

 

[Eggcessive]

It is probably CRD (mycoplasma gallisepticum or MG,) but coryza can also look like this. Coryza usually has a bad smell, with thicker secretions, and pus in the eyes. Duramycin is used for both, but I would use Tylan for CRD or Di-Methox (sulfadimethoxine) or sulmet for coryza. These respiratory diseases will come back and all chickens become carriers.