They've been lambing up at Oberon for a few weeks, and when it started snowing many were worried that the windchill would threaten the newborns.
But at Black Springs, the Aussie Whites have shown they are made tough, with ewes lambing in zero degree temperatures, that with windchill would have made it between minus 5C to minus 8C at the time of lambing.
The ewe in picture had twins. Not only that they are up and running in 50mins, the ewe is just 13 months old, having been joined at just 8 months.
According to Tattykeel's James Gilmore Aussie Whites are born with about 26mm of hair, that dries out more quickly than young woollen lambs after birth. Also he says their skin is a bit thicker than other breeds, that allows them to survive the cold winds. It also doesn't separate like wool when a full breeze is blowing.
Orange-based Central Tablelands Local Land Services district veterinarian Nigel Gillan said despite the tough recent cold conditions he hadn't heard of any lamb losses in the district.
Mr Gillan said he couldn't differentiate between sheep breeds when it came to surviving freezing temperatures. Wind chill was the main factor in lamb losses, not the depth of cold.
He said some breeds showed greater maternal instincts. Merino ewes were sometimes more likely to leave their newborns. He didn't know of any literature that said Aussie Whites had thicker skin.
He said one of the main points for graziers in the cold lambing season was finding the right paddock for lambing and making sure the ewes were in good condition so lambs were born with good birthweights that would help them survive in the tough conditions.
"Obviously you don't want any south-west facing paddocks in the cold. It's better to have the lambing ewes in hilly country, with some trees and or timber or tussocks so they can take protection in that."
The drought had meant some ewes were in poorer condition than normal but he had not heard of any lamb losses in the current run of cold fronts across the NSW ranges.
Another front is expected late on the weekend in southern NSW with snow expected for Orange late on Monday and into the evening.
James Gilmore said the Aussie Whites showed great sturdiness in cold extremes and he had heard of some Mongolian and Chinese sheep bred with similar lines to Whites surviving minus 35 degree temps.
He was amazed at the sturdiness of his Aussie Whites during the blizzard like conditions that hit near Oberon this week. "Aussie Whites are born with hair similar to a calf. Survival rates are phenomenal for these conditions. There's a lot less time for them to dry compared to wool sheep. Some lambs born in these conditions recently would snap freeze and they'd be dead. When these lambs were born it was zero, but with windchill we think its probably between minus five to minus eight. The photos show lambs just 50 minutes old, they're both up and having a go at feeding. We couldn't believe it."
Lamb marking rates at Tattykeel was between 120 to 140 per cent.