Herd monitoring Flashcards
If milk butterfat: protein ratio is high, what is the cow at risk of?
Ketosis
If milk butterfat: protein ratio is low, what is the cow at risk of?
Acidosis
What graphically shown parameter indicates the adequacy of energy being supplied for the herd’s average yield at each milk recording?
3.2% protein intercept
A cow has mastitis in her front right quarter and front left quarter which are treated with antibiotics and cleared up. How many mastitis cases does she count as, for annual incidence rate?
2
Why should two individual milk samples be taken daily for a herd milking twice daily?
Sampling only the morning milk decreases SCC and constituents
Due to dilution effect of longer night interval
A cow has elevated SCC or a clinical case of mastitis within 30 days of calving. When is she likely to have picked this infection up?
Dry period
Repeated cases of high cell counts are likely to indicate what pathogens?
Gram positive/contagious
Staph, strep
What is meant by the term ‘high-low cow’ with reference to individual cow SCC?
SCC high at drying off
SCC low at first milking recording after calving
What is meant by the term ‘low-high cow’ with reference to individual cow SCC?
SCC low at drying off
SCC high at first milk recording after calving
What parameters in milk can be measured to assess an individual cow’s nutritional status and energy balance?
Protein
Butter fat
Urea
When is a second case of mastitis in the same quarter counted as a new case (in calculation of annual incidence rate)?
If occurs 7+ days after apparent cure
What is the target BCS for calving a dairy calf?
2.5-3.0
What disease can a single bulk tank antibody measurement be taken in Autumn to indicate recent exposure of the herd to infection?
Liver fluke