I was out earlier tonight and was at about my 5th set up. I was using grey fox pup distress sounds. After about 10 min I turned the E-caller off and as soon as I did I heard a coarse, raspy barking noise to my left about 50 yrds. I looked with my light but my view was obscured by some brush. I turned the caller back on, and the noise continued, moving around my set up, staying in the brush, but never coming in. I heard it probably 20-25 times. I had never heard this noise before. Judging from the sound, it never came down wind of me, the sound just got more distant, leaving in the same direction from which it started. When I got up and checked, there were fox tracks that stayed just out of view, in the brush, about 180 degrees around my set up. I kinda think it was a grey. Anybody have any input?