Table 2.

Clinical scoring systems for the classification of shoulder ulcers in sows

Stage	Lund 2006a	Zurbrigg 2006	Baustad, Frederiksen 2006	Lund 2003, Jensen 2009b	Bonde 2004	Welfare Quality® 2009	Stage	Grading system in Denmarkc
0	No skin lesion	No lesion/scarring	Normal skin or fresh fighting wounds	Intact skin, no ulceration	–	–	0	No lesion or lesion < 2 cm
1	Lesion limited to epidermis, moderate scab	No current lesion but previous scarring	Ulcer with skin merely affected	Ulcer limited to epidermis (necrotic or sloughed), covered with a scab	No lesion	No lesion	1	Small lesion 2–5 cm in diameter
2	Lesion involves dermis; extensive scab; little fibrosis/granulation	Skin reddening	Ulcer penetrating the skin	Ulcer including dermis; sometimes scab; bordering granulation tissue/fibrosis	Scratches	Old lesion, healing wound, reddening
3	Lesion penetrates to subcutis; intense granulation	Broken skin < 2.3 cm	Ulcer extending to subcutis; granulation tissue possible	Ulcer including subcutis, sometimes scab; heavy formation of fibrosis/granulation tissue	Wounds	Lesion/open wound	2	Lesion > 5 cm; Thickened wound perimeter
4	Ulcer extending to bone; periosteal bony proliferation	Broken skin ≥2.3 cm	Ulcers with exposure of the scapula	Ulcer with exposed bone, proliferation of osseous tissue	–	–

^aModified by Jensen and Svendsen 2006

^bCited by Herskin 2011

^cNielsen personal correspondence