Hi all. I have a Pekin duck that has been having issues with a foamy eye/suspected sinus infection for a month or so. Vetrycin spray has been helping but not clearing things up, and apple-cider vinegar in the water has done nothing, so it's time for something a bit stronger. My vet friend said any antibiotic would do, but with the plethora of choices on the market I'm overwhelmed. Help please!