Springer Spaniel for scale.
It seems to be a ball with a cone hung over it perhaps for weather protection.
We have had these around our farm properties for a while for the same reasons. You can make them out of mesh wire and some 2X4 pieces of wood. Don't look as fancy as this but with the right bait (horse/cow dung and some meat scraps) you can get the same amount of flies. Really helps the animals and humans when the horseflies start swarming.