One of my girls developed a huge abcess looking thing on her beak between her nostrils and she is weezing badly. The abcess thing has gone down and almost back to normal but her weezing is worse and now she's coughing. This morning I noticed my other girls (6 in all) coughing and weezing. Their appetite and attitudes are the same, they just sound horrible. I tried VetRX but it didn't work. Any suggestions?