It does look like some type of injury, but she also could have been pecked after her eye became swollen and foamy. Can you get some oxytetracycline to put in her water, or get some Tylan 50 injectable, and give her 1 ml orally twice a day for 5 days? Those would treat mycoplasma (MG) just in case it is that. Terramycin eye ointment is oxytetracycline, and can be found at feed stores. If it is jut an injury, the bacitracin may be good enough. If you see any pus or other drainage, clean the eye before applying the ointment twice a day. Here is a little info on MG:
Mycoplasma gallisepticum
Synonyms: MG, chronic respiratory disease (CRD), infectious sinusitis, mycoplasmosis
Species affected: chickens, turkeys, pigeons, ducks, peafowl, and passerine birds.
Clinical signs: Clinical symptoms vary slightly between species. Infected adult chickens may show no outward signs if infection is uncomplicated. However, sticky, serous exudate from nostrils, foamy exudate in eyes, and swollen sinuses can occur, especially in broilers. The air sacs may become infected. Infected birds can develop respiratory rales and sneeze. Affected birds are often stunted and unthrifty.
MG in chicken embryos can cause dwarfing, airsacculitis, and death.
Transmission: MG can be spread to offspring through the egg. Most commercial breeding flocks, however, are MG-free. Introduction of infected replacement birds can introduce the disease to MG-negative flocks. MG can also be spread by using MG-contaminated equipment.
Treatment: Outbreaks of MG can be controlled with the use of antibiotics. Erythromycin, tylosin, spectinomycin, and lincomycin all exhibit anti-mycoplasma activity and have given good results. Administration of most of these antibiotics can be by feed, water or injection. These are effective in reducing clinical disease. However, birds remain carriers for life.
Prevention: Eradication is the best control of mycoplasma disease. The National Poultry Improvement Plan monitors all participating chicken and turkey breeder flocks.
