Is there a walking and non-walking cart version of the new K-9 Cart?

No, the new K-9 Cart has the ability to accommodate pets that still have some hind limb motion as well as pets that are entirely paralyzed in one or both limbs. All carts are shipped with sling supports that elevate the feet off the ground to protect them from abrasion. Depending on your pet, you can test whether the cart performs better by allowing them to walk or not. If there is any knuckling of the rear toes when walking on hard surfaces, it will be necessary to put your pet’s rear limbs in the leg slings. On grass and other soft surfaces, your pet’s rear limbs may be down in a walking position provided there is close monitoring for abrasion of toes.