Several of our park muscovies have foamy looking eyes. I looked it up and it said It could be caused by a respiratory infection. I bought VetRX and have been treating the ones with issues. Is there anything better to use. It says the stuff works for ducks with respiratory. The ones having issues are large males who aren't fond of being caught so I am just treating them by putting the medicine on a small piece of bread and tossing it to them. There is no way I can put it down their throats or on their beaks and under their wings like the directions say. I normally don't give them bread unless it is to get medicine down them. (Sorry - felt I needed a disclaimer for that). If it becomes necessary I will catch them and get them to the vet but just wanted to try the least traumatizing way first. If there is something better I can get please let me know.