A Tasmanian prime lamb producer says weaning performance has lifted sharply after five years of breeding choices aimed at maternal strength rather than sheer size. On a 4, 000-hectare mixed farm in Westwood, Andrew Archer says the shift toward composite genetics has helped push lamb weaning rates up by about 20 to 30 per cent. The result is more than a single-season improvement: it reflects a deliberate attempt to fast-track genetic gain across a flock of 7, 000 composite ewes operating in tough northern Tasmanian conditions.
Why the weaning result matters now
The numbers matter because they point to a breeding strategy that is improving output without changing the basic realities of the farm. Mr Archer runs the property with his wife Fiona and sons George, Jack and Fergus, while his brother Sam manages 400 hectares of intensive irrigated cropping on the same integrated operation with wife Annabelle and their two daughters. The livestock and cropping businesses are fully integrated, which means flock performance has a direct bearing on the wider farm system. In that context, a sustained lift in weaning rate is not just an isolated win; it strengthens the farm’s overall production rhythm.
Mr Archer said 2, 500 of the 7, 000 ewes are joined to composite rams from the Cloven Hills stud in Nareen, while the other 4, 500 are joined to locally sourced Poll Dorset rams. He has used the composite genetics for five years and says the flock has improved each year. The trade-off is higher micron and shearing costs, but he says the focus on maternal traits and weight gain has delivered the result the family wanted.
What lies beneath the headline
The deeper story is about how selective breeding is being used to solve a practical problem. Mr Archer says the genetic profile he wanted was maternal, moderate in ewe size, strong in weight gain and strong in weaning weight. That combination, he says, has allowed the farm to improve fertility and move toward faster genetic progress in younger ewes.
He says the composite ewe’s fertility is one of the biggest draws. The farm’s target is to wean two lambs at 100 days at 32 kilograms, and Mr Archer says that is close to where the operation is now sitting. He aims for a 180 per cent scan in May and a weaning rate of 160 per cent off mixed-age ewes. The change has been gradual rather than sudden, but that is part of the point: the improvement has been built year by year rather than through a one-off intervention.
There is also a climate dimension, even if Mr Archer frames it in farm terms rather than policy language. The composite ewes, he says, are better mothers and handle the frosty mornings and sub-10-degree days of northern Tasmanian lambing in July. In other words, the gain is not only about numbers; it is about resilience in conditions that can make survival harder for lambs and more demanding for mothers.
Expert perspective and farm-level implications
Mr Archer’s own assessment is central to the story because the operation is still in the middle of the transition. He says, “Their genetic profile was what we were looking for – maternal, not too big a ewe, good weight gain, and weaning weight. ” He also says, “We’ve seen our weaning percentage jump by about 20-30pc. ” Those remarks matter because they frame the change as an outcome of selection priorities, not luck.
He adds that using the composite genetics over younger ewes has been a way of “fast tracking genetic gain. ” That is significant for any producer watching margins closely. More fertility, stronger mothering and improved lamb survival can alter the economics of a flock even when some costs rise. In this case, the family says the increased micron and shearing expenses are outweighed by the performance improvement.
The practical implication is that breeding decisions can reshape a farm’s production profile over time without requiring a dramatic overhaul. The property’s integrated structure, with livestock and cropping managed together, suggests those gains may also support a more stable farm system overall.
Regional impact and the bigger picture
For northern Tasmania, the story is a reminder that flock performance is being driven by genetics as much as by management. The farm’s experience suggests that more targeted breeding can support weaning gains even in cold, challenging conditions. It also shows that producers are willing to accept higher operating costs if the genetics deliver consistent returns.
More broadly, the case illustrates a wider shift in farm decision-making: productivity is increasingly being measured through long-term biological improvement rather than short-term fixes. A 20 per cent lift in weaning performance is meaningful not because it sounds dramatic, but because it reflects repeated gains that compound across years, ewes and lamb cohorts.
The question now is whether more producers facing similar conditions will follow the same path, or whether this remains a finely tuned model built around one farm’s priorities and genetics.
