Measuring for your Dog Wheelchair

FOFThe Fold of Flank (FOF)

To measure the height of your pet for our Walkin Wheels, measure from the ground to the “Fold of the Flank” as shown here. The FOF is a thin piece of skin that connects the dog’s upper rear leg to his body. Look at the webbing between your thumb and index finger. This skin is very similar to the FOF.

Overweight pets:

If your dog is overweight, then the fold of flank will probably hang down from his body, making the fold of flank measurement shorter than it really is. You will need to try and move the flank up to a normal position, to get an accurate measurement. The picture of the Boxer below shows a normal fold of flank for a dog that is not overweight.

Long Haired Pets
If you have a long-haired dog, you can locate the fold of the flank by pushing the hair back and feeling for the fold of flank skin.


  • If your dog can stand, use a metal retractable tape measure or yardstick, place it in front of his rear foot/toes and measure straight up to the bottom edge of fold of the flank.
  • Do NOT stretch the dog’s leg and foot out as this will add several inches to the fold of flank and give you an inaccurate measurement.

If you are unsure about how to measure, please call us (778-809-7421) before placing your order and we would be happy to assist you, as…

  • We do need the fold of flank (FOF) measurement to be as accurate as possible as that is how we determine the size of the wheels and struts your dog will need for his wheelchair.
  • If your measurement is not accurate, you may need to exchange the wheels or struts at your expense. They do snap in and can be easily changed.


If your dog cannot stand:

If your dog cannot stand, you can measure the fold of the flank when he is lying on his side. In order to get an accurate measurement, position the dog’s rear leg in a normal standing position: knee joint and hock joint will be slightly bent. Bend the dog’s foot at his ankle (like it would be if he was standing on his foot). In this picture the yardstick shows a FOF of 18 inches.

Do NOT stretch the dog’s leg and foot out as this will add several inches to the fold of flank and give you an inaccurate measurement.

Measurements to fit your pet into a Mini or Small cart:

See the Mini Wheelchair Page for pets 3-10 lbs!  See the Small Wheelchair Page for pets 8-28 lbs!

Once you’ve got the wheelchair

If you’ve received your pet’s wheelchair and are not sure if you’ve got it set up properly, take a look at the example below:


A – Knuckle at the hips. If you were to draw an imaginary line from one knuckle to the other, the line would pass right through the dog’s hips… where the bone of the leg meets the bones of the body. If not, tighten harness and/or adjust length. Allow 1″ on each side between dog and black knuckle.
B – Front Support loop at the shoulder. The loop on the front harness that the bar goes through should be at the shoulder. Adjust the straps so that the loop is held firmly against the shoulder. Then clip into cart.
C – The dogs back needs to be straight or arched UP (slight hunch). In this photo the dog’s back is arched down a little. This is NOT correct and this dog needs the Belly Strap.
D – The back legs need to be just touching, or just off the ground, depending on the health of the back legs. If the dog wants to use his back legs, then allow his feet to touch lightly. This is often adjusted by tightening the straps that hold the harness to the frame – this brings the dog’s seat up. (Take the dog out of the harness before adjusting.) If the height of the harness cannot be changed, then lengthen the leg struts. Consider boots if the feet drag. Use the stirrups if the dog cannot use his back legs or the feet are dragging on the ground.
E – The horizontal bar needs to be level.

If you have tried all of the suggestions and are still having a hard time, please call us at 778-809-7421. Our staff will be happy to assist you.