Do you have any pictures? In the US, we can buy plain Neosporin ointment, and there are a few others. In other countries where antibiotics are not available without a vet, usually have Chlorhexidene 1% in cream or solution. Savlon cream is one brand. If you have Betadine or povidone iodine, that...
It could be the other hens got to it and injured it. I would put some antiseptic cream on the wound. Flush the eye with saline and if you can get antibiotic ointment over the counter apply that twice a day. Saline is made with 2 tsp of table salt in 1 liter/quart of water. Then try putting the...