Table 2. Parameters of the three scales.

CANCRS	RbtGS [16]	Orbital tightening (0–2)
		Cheek flattening (0–2)
		Nostril shape (0–2)
		Whisker position (0–2)
		Ear position (0–2)
	CPS	Pupil dilation (0–1)
		Heart rate percentage increases—based on 250 beats/min (0–2)
		Respiratory rate—based on 60 breaths/min (0–3)
		Respiratory pattern (0–1)
		Palpation of the painful area (0–2)
		Mental status (0–2)
		Vocalization (0–3)

CANCRS includes the five Facial Action Units (FAU) of the RbtGS [15] and some clinical parameters gathered in the CPS. For each parameter, two to four scores were possible. The final score is the total sum of the ones given to each parameter.