What can carcass feedback tell us about breeding better lambs?

Our guest this week, Isabele Roberts, shares how six years of carcass data, research and on-farm trials have shaped her approach to lamb production.

Isabele runs Ridgehaven, a family sheep business in New South Wales that combines a stud, commercial lamb production and a research program. With her husband, sister and brother, she manages three properties covering 3,200 hectares, focusing on breeding sheep that meet the needs of businesses further along the supply chain.

Isabele has been involved in the Gundagai Lamb program since its early research work in 2020, using carcass feedback to understand how genetics, nutrition and management influence eating quality. The information has changed how Ridgehaven finishes lambs and selects rams, with different breeding priorities depending on the processor and the product required. She shares what the research has taught her about intramuscular fat, growth and the trade-offs involved in breeding lambs that can reach market specifications at a young age.

For Isabele, the aim is to work backwards from the end product, using performance data and visual assessment together to make better breeding decisions. She also sees producer and processor feedback as an opportunity for the wider lamb industry to improve production systems and deliver a more consistent product to consumers.

Head Shepherd is brought to you by neXtgen Agri International Limited.

We help livestock farmers get the most out of the genetics they farm with. Get in touch with us if you would like to hear more about how we can help you do what you do best: info@nextgenagri.com.

Thanks to our sponsors at MSD Animal Health and Allflex, Heiniger Australia and New Zealand, and ProWay Livestock Equipment. Please consider them when making product choices, as they are instrumental in enabling us to bring you this podcast each week.

Check out the MSD range HERE

Check out Allflex products HERE

Check out Heiniger's product range HERE

Check out ProWay's product range HERE

Selecting replacement ewe lambs is an opportunity to make more genetic progress in a flock, but how much are we missing when selection relies on visual assessment alone?

In this episode, Ferg shares his thoughts on improving replacement ewe selection. He explains how environmental effects can influence what we see in the yards, and why putting objective scores around those observations can lead to better selection decisions.

Ferg also explains how neXtRank accounts for environmental effects and trait heritability to rank animals against a flock's breeding objective, giving producers an opportunity to make better use of the information they collect without adding unnecessary cost or complexity to the process.

Get in touch today if you're interested in using neXtRank within your business

mark@nextgenagri.com

Head Shepherd is brought to you by neXtgen Agri International Limited.

We help livestock farmers get the most out of the genetics they farm with. Get in touch with us if you would like to hear more about how we can help you do what you do best: info@nextgenagri.com.

Thanks to our sponsors at MSD Animal Health and Allflex, Heiniger Australia and New Zealand, and ProWay Livestock Equipment. Please consider them when making product choices, as they are instrumental in enabling us to bring you this podcast each week.

Check out the MSD range HERE

Check out Allflex products HERE

Check out Heiniger's product range HERE

Check out ProWay's product range HERE

neXtResist can tell you which sheep are fighting off worms, even when worm numbers are low. Emma Noble-Campbell has been running the test for New Zealand breeders since she joined us in February.

Emma grew up on a sheep and beef farm in the North Island, studied agricultural science at Lincoln and did her honours on worm resistance and immunity in sheep. Since joining neXtgen, she has set up our "Spit Lab" (in Ferg's garage!) and is now running neXtResist, the SwabTec saliva test, for New Zealand breeders.

Emma and Ferg talk through how the test works. It measures the antibodies in a sheep's saliva against a protein worms release during infection, so it picks up variation between animals even when worm pressure is low, meaning it is not a requirement to push sheep to high egg counts to measure resistance.

Mark and Emma also discuss SHIELD, our new project on immune competence, worm resistance, whole body energy and hoof health. These are the four things we see going wrong most often on farms, and once one element fails, others tend to follow, and the sheep goes downhill. The aim is to breed sheep that are less likely to start down that path, without giving up production.

Tune in to hear more about SHIELD and how you can get involved.

Sign up to our newsletter to read more about SwabTec

If you would like to test your antibody levels with neXtResist, get in touch with Emma at emma.noble-campbell@nextgenagri.com

Head Shepherd is brought to you by neXtgen Agri International Limited.

We help livestock farmers get the most out of the genetics they farm with. Get in touch with us if you would like to hear more about how we can help you do what you do best: info@nextgenagri.com.

Thanks to our sponsors at MSD Animal Health and Allflex, Heiniger Australia and New Zealand, and ProWay Livestock Equipment. Please consider them when making product choices, as they are instrumental in enabling us to bring you this podcast each week.

Check out the MSD range HERE

Check out Allflex products HERE

Check out Heiniger's product range HERE

Check out ProWay's product range HERE