There are many vehicles for your dog to pull. Two wheel wagons meant to hull supplies and 2 wheel riding sulkies. There
are 4 wheel wagon and 4 wheel riding carts.
Look threw the links below and see what you like. There are a few things you will need to know first.
The vehicle must fit the dog, especially on a 2 wheel cart. The shafts must come to the center point of the shoulder and
be level back to the cart.
Here are some links to some great carts and wagons for your dog
Tonys Trailors, He also makes
2 and 4 wheel dog carts http://www.tonystrailers.com/dog/
Sierra KENNELS dog cart