We have had several birds getting what we call sleepy eye..one or both eyes become swollen shut with some having a frothy like discharge..some get really lethargic, they still eat and drink but are very frail. some have recovered and some have died (they linger on for a very long time). Some of the roosters become lame in one leg and just eventually give up. I have read up on all the diseases that it could be..but can not pin it down to just one thing ..so many of the diseases have the same symptoms..We are stumped..we have given antibiotics in water..I have tried injectable antibiotics. we have used VETrX.we have wormed them and treated them for mites. Every time we find one with the "sleepy eye" we separate them and put them in the "sick ward". I feel bad I dont want them to suffer, but I also dont want to put them down in case they get better. Most of my birds are free range and all get fed very well. we keep their coops, roosts and cages really clean and they always have fresh clean drinking water. Any ideas...anyone?