Oh I see. Poor Tweety. Even with these symptoms, it can be many things and its not neccessary that its psittacosis. *If* it does happen to be psittacosis, the disease IS treatable and birds recover fully after treatment. I believe Dexter will also have to be treated if that's what she has. It could also be a minor bacterial/fungal infection, so hopefully the vet will let you know what it is and start the treatment. A runny cere and sneezing *can* be allergies, or sinus, but with that, I would doubt the droppings would be runny. Was Tweety showing these symptoms before Dexter came? If not, its possible that Dexter brought the illness with him. Some birds can have psittacosis and show absolutely no symptoms. Others can be carriers, giving it to other birds but not getting ill themselves. That's why it is important to get a new bird checked by the vet and keeping it in quarantine, away from the other bird, for at least 1-2 months so you can moniter the new bird and make sure everything is normal. Good luck Tweety bird and get well soon!

When are you going to the vet?