Just thought I would add (late to this thread) that these greys really can be so deeply *moved* by trauma. our grey slipped and fell once in the kitchen... he did not come back into the kitchen for 6 months! He was fed in there, but we had to move his food out of that room and slowly-slowly inch it back in ( the funniest was the week that the food dish was in, around the corner, but he stood in the dining room and stretched around the door jam to reach his bowl.)
So I think your attempts to calm the morning down and help him make small steps to being comfortable and un-afraid are the best thing you can do... and it will take time!
Best to you