I don't know if it helps, but the pictures of the chicken with the swollen, bubbly eye look just like ILT to me. In that case, you have to just keep them isolated, away from dust and treat with terramycin for any secondary infections and just hope for the best. You know, it occurs to me that your chickens are coming down with a variety of different illesses and this would indicate an underlying immunosuppresant event. Were your birds vaccinated for mareks. Sometimes they can come down with mareks and the mareks wont kill them or even be really symptomatic. What mareks does, though is that it really deftly supresses the immune system and leaves them open to all kinds of pathogens and, in addition (since you mention some birds with weak, shaky or deformed legs I believe), some pathogens can keep the body from absorbing certain essential vitamins and minerals. Coccidia, for example, can sometimes lead to rickets. Maybe you're looking at mareks as your cheif underlying cause, or maybe not, just a shot in the dark.
I am now down to just 2 Breda - no idea on gender - a black and a splash, only a BCM roo, and only one Isbar pullet and 3 roos. The Isbar pullet laid her first egg today though so that is nice.
The only runny noses I saw today were from my 3 problem children who won't go in any of the coops where the oxine is, and insist on hanging out on the porch or under it. I still have one swollen eye, but I am going to keep on keeping on and see if we can fix that. It only just started so I am hopeful. Going to be using activated oxine to clean and disinfect everything possible today.
The 3 roosters who used to live on that side of the house but had to get moved because they were attacking the smaller roos got sick when I moved them. Well last week they figured out how to get back to where they came from and brought sickness with them. Can't catch a freaking break. But the hens are starting to lay like mad and a friend is incubating them and having very good hatches with healthy babies. 
