Sick Chin any help appreciated!!!!!

So our chin dusty isn't doing well. He is about 7 years old and we have had him since he was a baby.
Yesterday we found his left eye swollen and "glued shut" from discharge.
He is also having a hard time breathing accompanied with nasal discharge and wheezing.

My wife and I took him to an emergency vet as soon as we got home last night. The vet said, there is gurgling in his lungs, as well as in his lower lungs. She does not specialize in exotics and go figure they did not have any baytril. She said his heart sounds good, we were concerned since his brother died overnight from what we guess was heart failure last January. (Acting normal the night before no changes in behavior, but passed away throughout the night.)

His front teeth are ok as well, but she couldn't see his back teeth obviously.

She sent us home with Sulfamethoazle and Trimethoprim. And a prescription of Oflocacin eye drops for his eye. This morning his eye was glued shut again.
He did not eat or drink last night. We are giving him critical care today.

We just gave him his prescription, and now he is perking up, it may be just because his eye is open again.
As i type this he is trying to itch his eye on his cage and just took a bite of food, and now is investigating the fresh hay we gave him. he always seems to perk up a bit after his oral prescription.

If we don't see an improvement with his discharge we are getting some baytril from our vet on Saturday.


What else can we do, what to look for, what are we missing. ??????