I made three dog Nose Work boxes. Each one is 12x12x12 with a 4" hole in one side. There is a perforated baffle inside to separate the box into two chambers. The back side has a hinged door with a magnetic catch. The perforated baffle keeps the dog from being able to ingest the scent target, while still allowing the dog to smell the target. These are made of half-inch BCX plywood cut on the Delta tablesaw, nailed up with air nailers at the space. All edges are sanded smooth and the edges of the hole were rounded with a 1/8" roundover router bit. DMS router table, my router bit.
Here’s one of the boxes:
And here’s a back view showing the partition and my scent target (a drilled out pill bottle with scented felt pads inside), oh and a helper:
And here’s my helper again, Moses (my avatar!) showing proper alert behavior when he “hits” on a target - “down” with his nose as close to the scent as he can get:
With three boxes, I can have one “hot” and two empty targets, or add decoys, like his favorite toy.