I used Trophy Rock last year but sadly two spots I put rocks in I had dang cattle come in and DESTROY the rocks and the surrounding area. Made me pretty sad to see the area trampled.
I did have some great success with two other locations with both elk and deer coming in, but more elk than deer. I wonder if the deer didn't like it much.
Question about the photo - I see you've broken up the large rock into small pieces. Is this more effective than having just one rock?