I have a merganser duck for 3 days that was found in the road injured with head trauma. He is alert and moves around well, but both eyes were crusted closed and there was some blood coming from his mouth. The bleeding stopped quickly, and I washed his eyes and got them open. I have been applying triple antibiotic ophthalmic ointment that I had left from when it was prescribed for my cat a few months ago. He is blind in both eyes. I have seen him drink and even sit in the tub of water that is with him, but I can't get him to eat. I have tried putting the food in the water and holding it in front of him...he just gets angry and hisses at me. Any help would be greatly appreciated, I have experience with chickens, but not with a duck like this. Thanks in advance!