Table 1.

Skin injury scoring system for sows (modified from Parratt et al., 2006 and Schrey et al., 2018)

Score	Definition
0	No injuries
1	Low number (< 5) of superficial scratches
2	Medium number (5–10) of superficial scratches or low number (< 5) of deep scratches
3	High number (> 10) of superficial scratches or medium (5–10) or high (> 10) number of deep scratches

Superficial scratch: Injury of upper dermal layers, slight reddening, possibly minimum bleeding or scab.

Deep scratch: Injury of deeper dermal layers with reddening/bleeding/scab, necrotic or purulent processes possible.

No discrimination was made between new and healing scratches. Scars and shoulder ulcers were not regarded.