Does she have any nasal drainage, sneeze, cough, or noisy breathing in addition to her swollen eye? Is there any drainage or pus in the eye? Do you think that she could have been pecked in the eye? She has what looks like peck marks around her face and comb. Vet Rx is an herbal oil that is about equivalent with Vicks salve. I would try treating with an antibiotic-- Tylan 50 injectable, but give it orally since it can cause tissue damage at injection sites. Dosage is 0.2 ml per pound (about 1 ml for a 5 pound hen) given twice daily for 5 days.