First off, let me say that I just discovered your art, and I am absolutely amazed. This picture is possibly one of my favorites. I can see this creature as having been human at one point, though went through some grotesque transformation into your Good Boy. The fact that there is a doll seems to say that it still has part of its humanity, which gives this picture an almost sad tone. Of course, it could merely just be a chew toy, too.
I love him so much. I feel he should hang behind a front door and when you walk in he greats you. You nailed the creepy experience of this creature in the imagination so perfectly that he speaks to you. Do you suck at anything????