This postural reaction also is performed rarely, but it may be helpful in patients with subtle thoracic limb deficits. The pet should be supported under the abdomen so that the pelvic limbs are held off the ground and then walked on its thoracic limbs. With this posture, vision is compromised and the animal relies heavily on GP. With the head extended in normal position, dogs and cats should walk with symmetric movements of both thoracic limbs. With severe lesions, patients may carry their head flexed with the nose oriented close to the ground for support.