I am so gratrful for all the advice I received from BYC members. I thought I was going to lose all my birds. They were all coughing gurgling and had runny noses. So I found out about Tylan 50 powder. This is a miracle drug. I mixed 1 teaspoon full to a gallon of water and added a little sugar so it would not taste so bad. They drank it all every day. I noticed a huge improvement after the first dose. I gave them the Tylan water for 5 days and all are well. I can tell they feel good. They almost look like they are dancing and running around having a ball. They haven't been this active in months. Once again thanks to all for the advice.