I bought four call ducklings and this one has eye problems. The seller didn't tell me that until after I had agreed to buy them, then I felt sorry for the poor little thing and brought it home with the other three. Seems to be completely blind? What could be the problem and is there anything I can do hor him/her? Or do I now have a special needs duck? I want to do everything I can to give him a happy, comfortable life. Any advice is greatly appreciated!!