Some mornings, they just don't feel like gobbling I guess. I had a case like that this year, I still called in a bird, it just came in quite. So be alert and don't let it bust you before you bust him (which I let it bust me). There still around, because they can't go inside. Just stick with it, set up where you know they like to go, and good things will happen. Tomorrow morning could be a totally different story.