I have 2 three and a half week old pekin ducklings, Cosmo and Wanda. Cosmo has a lot of red in the whites of his eyes. He had some drainage which seems to have disappeared with more swim time, but the red remains. No swelling at all. What is safe to use in his eyes. Drops, neosporin, something to put in the water. I have some powdered duramycin on hand. Otherwise he is totally healthy. It just looks very uncomfortable and I don't want a potential eye infection to worsen. Any advice would be appreciated. Thanks.