Table 1.

Commonly-used hock condition scoring (HCS) systems and the criteria employed.

Reference	HCS Scale	Clinical Criteria and Description of the Hock Condition
		Normal	Hair Loss	Skin Changes	Ulceration	Swelling	Distinct Features
Rutherford et al. [79]	1–2	√	√	√	-	√	Absence of scores to categorize different level of clinical manifestations, hock ulceration not mentioned
Lombard et al. [80]	1–3	√	√	-	-	√	Hock ulceration and skin changes are not considered
Ahrens et al. [81]	0–4	√	√	√	-	-	Well description of skin changes but no consideration for ulceration and swelling hock
Potterton et al. [78]	0–3 for each category	√	√	-	√	√	Well description of different levels of hair loss, hock ulceration and swelling. Skin changes were not considered
Lobeck et al. [82], Gibbons et al. [83]	1–3	√	√	-	-	√	A single score for the each category
Van Gastelen [84]	0–3	√	-	-	-	√	Only used presence of lesion and swelling as manifestations of hock injuries

Note: √ depicts if criteria is included in the scoring system.