Hello, we look after three male Indian Runner ducks, which we hatched ourselves this year. They all appear to be in very good health, they're lively, have very good appetites and look a decent weight. Today we noticed that one of them, The Rev, is either hiccuping or coughing or sneezing. He doesn't appear to be in any other distress and I think he seems too vocal for it to be something stuck in his oesophagus. We live in Southampton, UK and the temperature has been dropping to about 8 degrees centigrade. Any advice?