I have a 10 month old black Orpington hen that appears to have an eye infection. The right eye keeps swelling up, with hard puss. We've pulled the puss out with tweezers, and treated with neosporin with no results. It keeps coming back. Last Saturday, we treated her with tetracycline/hydrochloride powder mixed in her water, along with wazine wormer. Have left it in her water since then. Checked her this morning and it's coming back, what should I do? She only lays once every couple weeks, but didn't lay well before the infection.