Series A consisted of four blinds, at 60-90-130-370 yards.
- The gunner's position was in front of a tree in a diagonal row of trees, so that without being able to see the gunner after the gunner had retired, the dog had to remember which tree the gunner had been throwing from.
- At that distance, the gunshot was relatively faint, giving the dog limited help in finding the correct direction to look in order to mark the throw.
- The ground was covered in patches of white from a light snowfall that morning. In addition, the backdrop for the throw was the speckled pattern of winter tree foliage against grey sky. As a result, the thrower was difficult to spot at that distance, the arc of the throw was barely visible, and the thrown bumper was also barely visible lying on the ground. In addition, the freezing temps reduced the strength of the bumper's scent.