Sheep and Goats Flashcards
How many days post-tupping do you scan?
60-90
What % of lamb losses are within a few days of birth?
15%
What should BCS be when put to ram?
3-3.5
What BCS should ram be at tupping?
3.5-4
What should BCS be during lactation?
1.5-2
How long after lactation do ewes have to gain back BCS before tupping?
2-3 months
How many kg of lamb do you get per ewe?
10kg
What weight are lambs weaned at?
30kg
What weight are lambs finished at?
40kg
How long does it take to increase BCS by 0.5?
3 weeks
What level can you measure instead of doing BCS?
3-hydroxybutyrate
What level should 3-hydroxybutyrate levels be?
Below 1mM
What age should ewe lambs be bred?
7-9 months
Why should you feed ewe lambs separately?
Because they are only 60% of their adult weight
Which breeds show a summer anoestrus?
Most
How long is the oestrus cycle in a ewe?
16-17 days
How long is the oestrus cycle in a doe?
18-21 days
What must happen before oestradiol surge to induce oestrus in the ewe?
Priming with progesterone
What is the first ovulation of the season like?
Silent and short (6-8d)
When do more Northern sheep come into season?
Later
For how long do they show oestrus behaviour?
24-36 hours
What are two oestrus behaviours shown by a doe?
Tail wagging and flehmen
How many times is the ewe served naturally?
4 times
Why are the uterine horns long?
Because multiple foetuses