I have a stupid question to ask. Our gosling who is twelve weeks old was injuried by a opossum. He had several punture wounds on his head and wing. He is doing wonderful and is almost healed. My question is this. When we were applying neosporin to his cuts he got very greasy and dirty. How can I safely clean him off. I don't want to use anything that will harm him when he preens himself. Thank you Micki