TABLE 1.

Descriptions of directly observable behaviors

Behavior	Definition
Eyes closed	3-second minimum
Stereotypy	Repetitive movements (entire body or just head, often hand licking/gnawing)
Chewing	Vertical jaw movements
Licking	Tongue repetitively in contact with anything
Tongue movements	Tongue rolling inside mouth from cheek to cheek
Tongue protrusion	Sticking tongue out of the mouth for a minimum of 3 seconds
Biting	Teeth in contact with cage
Vocalization	Barking, grunting, or other sound originating from the mouth or throat
Tremor (body)	Shaking or trembling of body
Tremor (extremities)	Shaking or trembling of digits or limbs
Ptosis	Drooping eyelid
Hypersalivation	Excessive secretion of saliva exiting mouth cavity
Retching	Sound and movement of vomiting without vomiting
Emesis	Vomiting
Rhinorrhea	Runny nose
Lacrimation	Secretion of tears
Piloerection	Bristling (standing up) of hair
Scratching	Fingers or toes rapidly contacting and sliding on a part of the body
Yawning	Mouth opening widely and vertically
Tail wagging	Horizontal or vertical movement of the tail
Loss of balance	Falling over
Aggressiveness	Threatening posture and/or behavior
Skin color	Abnormal skin color
Posture	Abnormal body position