I please need some help, I can' t raise chickens for the life of me. Ducks, no problem, but chickens is a problem..... It starts when I notice it one of my chickens will have a swollen, closed, red eye, one got so bad it sealed closed and looks to have collapsed in or sunk in sealed shut. I went and purchase Tylan gave every one of them a injection. I then followed up with a tectrocyclin in their only water source. I had a bunch to just die. All has been well then out of now where I see one with the eye problem, and treat it isolated it, but then the next day 3 dead young pullet size chickens that didn't show any illness signs, so I am just baffled, I don't know what is doing this or how to get rid of this whatever it is disease. I have sprayed my pens and housing unit with bleach to unbearable levels the first time, the second time I bought the tek-trol and sprayed to high heavens with it. If any one has any information to what is causing this or how to stop or treat it, I would sure be grateful, but my chickens would be more grateful than me.