CUSTOM DOG CARTS | Manufacturing and selling the finest dog carts for draft dog competition and recreation.
Janet Moyer
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The MODIFIED SIWASH HARNESS is the standard harness for draft dog carting. It distributes the weight of the cart and cargo around the cart, instead of pulling all the weight from the dog's chest. Harnesses are available for individual sale. Contact us for available color choices and current pricing.

STANDARD SIWASH HARNESS: For dogs 24 inches or taller at the withers

There are clips on each top sides of the withers that clip into the harness for the forward girth. The forward girth clips into another clip that is part of the harness. Then the shafts are inserted into the loops. This harness is the draft dog standard for medium to giant breeds. However, if you have a smaller dog the clips fall too low on the side of the dog which results in incorrect placement for the shafts.

OLD-STYLE HARNESS: For dogs smaller than 24 inches

This harness is used for smaller dogs up to 16” at the withers, and approximately 25 lbs. or less. Shelties, Beagles, French Bulldogs, are examples of smaller breeds that benefit from this harness.

This harness works as it does not have the clips at the top sides of the dog’s harness as seen on the standard Siwash harness. Instead, there is a loop at the top of the harness. You thread the forward girth through the big loop. then adjust the loops on each end of the forward girth. The loops are now hanging on each side of the dog. You now insert the shafts into a loop on each side of the dog.

The loops can be shortened or lengthened as needed. Be sure that the shafts are now parallel to the ground. Use the loops to make the adjustment.

WEIGHT INSERTS by Custom Dog Carts

Weight Inserts are made to fit into the baskets of the dog carts. The sturdy insert can be attached to the dog cart with nuts and bolts. The insert is made for weights with round hole in the middle.

Perfect for draft dog competitions as the weights are centered on the axle and the weights do not move around. This insert has been successfully tested in draft dog competition. The cost of the Weight Insert is $ 75 plus shipping.


Good for rough terrain and long hauls as in the draft dog competition trials, or if you simply don’t want to be inflating tires. These tires are usually included with the carts unless the customer does not want them. Pneumatic tires have gone up in price and availability.

An original design by Custom Dog Carts

If a dual use cart is desired, you can order the kit to transform the Brace Cart to a Single Cart and then back to a Brace Cart. This conversion has to be part of an original order due to some welding.The Conversion Kit consists of a separate pair of Take-Apart Shafts with brakes and a single tree. The cost is an additional $ 165.