Table 2.

Composite measure pain scale modified from Lindegaard et al. (2010). The categories ‘location in the stall’ and ‘response to open door’ were left out as the horses were restrained in this study. ‘Response to approach’ and ‘response to grain’ were changed to comply with horses being restrained and were left out for the evaluation 10 minutes after initiation of the noxious stimuli as no observer was present

Behaviour category	Scores
	0	1	2	3	4
Gross pain behaviour*	None		Occasional		Continuous
Weight bearing	Normal weight bearing	Foot intermittent of the ground/ resting more than other front limb		Continuously taking foot off the ground and trying to replace it	No weight bearing. Foot off the ground or toe just touching the ground
Head position	Above withers or eating	Level of withers	Below withers
Response to approach	Looks at observer. ears forward		Does not look at observer, ears back
Response to treat	Takes treat with no hesitation		Looks at observer		No response
Subjective pain score	No apparent pain	Mild discomfort	Slight pain	Moderate pain	Severe pain

^*Gross pain behaviour includes; pawing, swating, flehmen.