Hi Joyce,
Good to see you back, sorry about the spinal injury ... those are always rough and very painful.
Could it be an allergic reaction to something new, or was he this way when you got him?
I have to agree with Jamie, it may not be an upper respiratory infection ... that is usually clearly heard in the lungs.
You might want to get his teeth x-rayed. Like Jamie said, it could be malocclusion. If it is, and it is to the point that he is not being able to eat or drink properly ... and the problem can not be fixed ... there would be only one other alternative. I hope that is not the case, but sometimes you have to consider it, for the chin's quality (or lack of it) in life. When the malocclusion invloves the sinus cavity, the brain, the eyes or tounge, it is almost always fatal and can get really rough at the end. As long as he has the will to live, keep trying, but once the will is gone, it is best not to force it.
Let us know how he is doing and what you find out. We'll keep yall in our prayers.
Jo Ann