Our dog truck is a 1998 Ford Expedition, while our dog car is a 2004 VW Jetta Wagon. Initially, we liked transporting the dogs loose in the vehicle since it allowed the dogs to pick their spaces. We recently decided to make individual internal dog boxes. One reason for the dog boxes was to make it easier at events since we could release individual dogs. A second reason was for safety. Dog boxes allow the dogs to be securely fastened and allow each dog their own private area.

Most dog boxes are built on pick up truck beds - and for good reason. With a pick up truck bed, there are more straight sizes and there are fewer constraints on the dimensions of the dog boxes. With a full size or mini-van, the floor is much lower, making it easier to fit the required boxes. With a full sized SUV such as the Expedition, the rear air conditioning, lift gate framework and general shape of the interior intrude. In addition, we wanted to be able to raise the rear seats if required to transport people or equipment.

We designed our boxes based on Mush with Pride guidelines. We decided to make the boxes so they could be opened either to the outside or inside of the vehicle. We transport our Fritz Dyck rigs on an external rig carrier, which limits which direction the dogs can be loaded or unloaded with the rig carrier in place.

The two larger dogs (Okemo and Sobo) each have their own dog box on the lower level. T-Bone and Zoë each have their own dog box on the upper level, complete with a "bay window" and view. Puppy Acadia has the smallest box in the center of the upper level. The bay window basically fills into the rear windows on the truck and allows the upper boxes to be larger. There is a set of wire grills between the dog area and the window.

We built the boxes as light as possible. The floor between the upper boxes and lower boxes is made from 1/4" plywood and 1" x 3" framing supports. Wire shelving was used for the doors and sides of the boxes to allow good ventilation and reduce weight. Wire cable clamps were used as hinges for the doors.

One of our concerns was sealing the wood to prevent damage from accidents, wet paws and similar. We used West Epoxy to seal the floors of the dog boxes. Acadia's box has a boot tray bottom, which gives good security against accidents and can be easily removed. The other boxes have bath tub mats on the floor to contain dirt and moisture. We may replace the bath mats with something else if we can find an economical replacement.

The upper boxes are shorter than the rear boxes. The rear lift gate has a bit of a forward cant to it, which forced the upper boxes to be shorter. Since the upper boxes are shorter, there is a short shelf that can be used to store leashes and other items.

The boxes seem to be working relatively well. Okemo and Sobo both happily jump into their boxes. The upper level dogs need to be lifted into their boxes. We really like the boot tray floor for Acadia's box, but it would be tough to find one to fit the other four boxes since their shapes are relatively unusual.

The boxes were relatively time intensive to build and required considerable trial and error cutting to obtain a satisfactory fit.