Introduction to production diseases

Question 1

What are the main challenges for a dairy herd during parturition

Answer 1

Energy balance
Metabolic diseases
Dystocia

Question 2

Definition of transition period

Answer 2

3 weeks before calving and 3 weeks after

Question 3

Outline dairy cow cycle

Answer 3

2 years
1. Calving- Sex of calf determines fate
2. 13-14 months- Pregnant
3. Ideal to first calve by 2 years
4. Lactates for 7 months. Bred again 60-90 days post partum. dried of for 2 months.
5. Pregnant again

Question 4

______________ contribute to almost all herd problems

Answer 4

Imperfect husbandry systems

Question 5

Outline 4 stages of herd health planning

Answer 5

1. Monitor performance
2. Compare to set targets
3. Understand shortfalls
4. Implement changes

Question 6

Main consequence of Low DMI at calving

Answer 6

Negative energy balance causing ketosis and immune supression

Question 7

Main consequence of low dietary fibre

Answer 7

Rumen acidosis
Lameness

Question 8

Main consequence of diet deficiencies in antioxidants

Answer 8

Immune suppresion causing metritis

Question 9

Main consequenece of low magnesium diet

Answer 9

Hypocalcaemia causing displaced abomasum/milk fever/mastitis