Sorry for the slow replies. Did she make it? It sounds like she probably didn't. Since this was the second bird to come down with a potentially deadly disease I would think it is contagious.
I'll preface this with, "not an expert", but it sounds like it could be MG. It causes the eyes to swell shut, breathing problems, lethargy, and often death. Unfortunately, if this is what you're dealing with--or any of the infectious diseases with similar symptoms--then the whole flock probably has it already, and will either need culled, or quarantined. So my advice is to send off your bird for a necropsy to be sure, but proceed with quarantining the entire flock.
PS - I believe the eggs should be safe to eat regardless. But if it is MG you shouldn't hatch the eggs, because they will be born infected.
Edited by Toddrick - 11/6/15 at 1:08pm