I would try some Terramycin Eye ointment from a feed store. Gentamycin is for specific gram negative bacteria, not gram positive, and if the eye bubbles is connected to MG, the Terramycin may help. MG is a chronic respiratory disease. However the chicken may have something wrong with a tear duct or it’s eye.
I had a little hen who had the bubbles in her eye on very cold mornings. Then it would clear by morning. She had no other symptoms, and I gave her several days of Tylan 50 injectable, a drug that treats MG. Nothing helped, most days she had no foam, then others she would. She did have a lot of feathers around her face, so I sometimes wondered if that was the problem.
As long as yours just has it in one eye, no other symptoms show up, and no other chickens gets symptoms, I would just clean her eye and not worry. If you decide to try Tylan 50 injectable at some point, it can be given orally 0.3 ml twice a day for 3-5 days. You would need syringes and needles, then remove the needle to give the medicine by beak.
I had a little hen who had the bubbles in her eye on very cold mornings. Then it would clear by morning. She had no other symptoms, and I gave her several days of Tylan 50 injectable, a drug that treats MG. Nothing helped, most days she had no foam, then others she would. She did have a lot of feathers around her face, so I sometimes wondered if that was the problem.
As long as yours just has it in one eye, no other symptoms show up, and no other chickens gets symptoms, I would just clean her eye and not worry. If you decide to try Tylan 50 injectable at some point, it can be given orally 0.3 ml twice a day for 3-5 days. You would need syringes and needles, then remove the needle to give the medicine by beak.