Approach to lameness in a herd

Question 1

What are the 2 types of lameness data that we can collect?

Answer 1

Mobility score data
Lesion data

Question 2

List 2 ways to gain mobility scoring data

Answer 2

visual assessment
automated methods

Question 3

what is calculation to work out mobility index

Answer 3

% Healthy cows (Mobility index) = (number of not lame/ total number) x 100

Question 4

What is the calculation for the lameness index

Answer 4

% Lame cows (Lameness index) = (number of cows with AHDB score 2 and 3/ total number) x 100

Question 5

What is the target mobility index and target lameness index

Answer 5

mobility index= >90%
Lameness index = <10%

Question 5

what is the target % of severely lame cows and target % of chronic lameness

Answer 5

severely lame <1-2%
chronic< 25%

Question 5

what is % chronic in lameness records

Answer 5

= recorded lame for >2 recordings

Question 6

what calculation do you need to do to work out monthly incidence rate

Answer 6

= (n. lame cows that were not lame at previous recording/cows not lame at previous recording) *100

Question 6

what is the net lame index

Answer 6

=Number of new cases/number of recovered cases
target <1

Question 6

Describe how to approach herds with a lameness problem

Answer 6

based on locomotion score
Based on hoof trimmer records
Based on treatment records

History
Herd assessment
Intial problem list