From: Milk-flow data collected routinely in an automatic milking system: an alternative to milking-time testing in the management of teat-end condition?
Callosity ring thickness
Callosity ring roughness
Total
Smooth
Rough
Not visible
53
–
Thin
80
37
117
Intermediate
30
31
61
Thick
10
8
18
Extremely thick
2
173
78
251