27: Beef population medicine Flashcards
How long is the breeding season?
9-12 week
What % of costs does feeding make up?
75%
Does sexual maturity relate to weight or age?
Weight
What is the usual age of maturity?
5-6 years
By what day should conception be to ensure 365 day calving interval?
80 days
How many cows can young bulls serve?
20-30
How many cows can older bulls serve?
40-50
How long before breeding season should BSE be?
4-6 weeks
What should scrotal circumference be?
34cm
What should BCS be for the bull?
3-3.5
What are four problems with difficult calvings?
Delayed return to oestrus, can be infertile, spreads calving pattern, increases replacement rate
What should you do if more than one assisted calving?
Cull
Why do late-calving cows get more dystocia?
Over-fed
WHich causes of calf scours can be vaccinated against?
BVD, E Coli, rotavirus, coronavirus, Salmonella
Which causes of calf pneumonia can be vaccinated against?
BVD, IBR, PI3, RSV, Pasteurella