Episodes may include one or any combination of the following:
* Freezing momentarily
* Freezing or walking with the head down and to one side.
* Stiffness in the back legs
* An apparent lack of coordination in the rear or front limbs
* A bunny-hopping gait
* Roached back with stiff back legs (may be a sign of back injury)
* Temporary loss of control in the hind legs
* Attempting to rise only to fall
* Rolling or somersaulting
* Laying on one side with the back legs extended, limbs may twitch
* Apparent 'spasm'
* Drooling
* Retraction of the front legs, sometimes over the head
* Tightening of the muscles around the mouth with an inability to open the jaws
* Eyes may appear to bulge as the muscles of the face contract.
* The 'deer stalker' position where the front legs contract and the rear legs stiffen (see the video of Penny)
* Chronic tenderness and stiffness may exsist in extreme cases.
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