Table 2. Macroscopic Lesion Scoring System.

DD Induction Lesion Scoring System:
choose most accurate description from each of three observations and summarize (10 = most severe, 0 = no lesion)
Observation 1: Size of Lesion:
5	Expanding from initial abrasion area
3	No change in size
1	Lesion smaller than initial abrasion area
0	No lesion present
Observation 2: Color of Lesion:
3	Bright red
2	Pink
1	White
0	No lesion present
Observation 3: Edges of Lesion:
2	Non-descript edges
1	Well defined edges
0	No lesion present

The macroscopic induced lesion scoring system utilized by blinded observer to score the degree of lesion development. The total lesion score was the sum of all three observations. The macroscopic scoring system had a high level of correlation with the histopathologic changes associated with digital dermatitis, r (30) = .48, p < .01.