Sorry for so long in answering. Your Macaw needs to go to an Avian Vet to be checked out. Eating from the side of the mouth is not normal or even close to normal.
Keep us posted on how she is doing and thanks for writing.
Linda
Sep 04, 2009
Greenwing eating question by: Tracie
If you think there is something wrong, it would be best to take your bird to an avian vet to be examined. I hope all is okay.