I have a peachick that was born late July. Its eyes seemed swollen I did not see any sinus issues and it was breathing fine but I went ahead and treated for sinus infection with LA 200. The eyes are still swollen it is more behind the eyeball itself not the surroundings of eye or lids. I have read that some birds can be born with Arthritis type issues that can cause this and can be treated with antibiotics to cure it BUT I have not found anywhere as to what antibiotic to use or dosage. He is getting picked on by other chicks and not growing as good as others and it keeps its eyes closed alot. Anyone with information would be greatly appreciated by me, this baby is so sweet and I dont want to loose him (even though I know he will not be good breeding stock as if it is this arthritic condition it can be past on). He is a IB pied split purple/white spalding