I have a cinnamon green cheek named Rosco was hatched on 7/15/11. When I bought him last month he had a groove from his nostrile all the way to the tip of his beak. I noticed that it is getting worse is that something I need to be concerned about?
Any chance you can post a picture for us? That would help in knowing what it is. Honestly, regardless of what it is, if it's getting worse it needs attention. Let us know what your vet tells you. BTW, Rosco is a great name!