IT has been just over a decade since Kenton and Amy Peart began developing the 24,300-hectare Dunvegan, 52km north-east of Charleville.
Their dedicated program has seen them blade plough and seed large tracts of their property to improved pastures including silk sorghum and buffel grass.
But the real breakthrough came when they made the decision to invest in a 60km exclusion fence.
The 1.5m-high, grip-lock fence features an apron and was erected in 2011.
At about $7000/km, it was a huge investment, but one that Kenton Peart says has paid big dividends.
"Prior to putting up the fence, we were losing about 50 per cent of the pasture to pest animals," he said.
"We were trying to rotationally graze, but it was impossible because we just couldn't budget or manage our feed.
"We are also hoping it will help us control wild dog numbers."
Kenton said the fence provided the respite new pastures needed to become established.
"We were able to burn paddocks that we hadn't been able to clean up.
"Prior to putting up the fence, we were never able to get enough dry matter to burn country for pasture development.
"Now we can seed and rest country to allow new pastures to establish."
Managing and conserving pastures and sustainability is paramount to the Pearts, who use little to no inputs to maintain their organic breeding herd.
Cattle are selected to fit within the sustainable grassfed production system.
"We have found more moderate-frame size cattle with lower maintenance requirements to be most compatible with the environment.
"Females are selected for fertility and adaption to ensure that, come a tough season, they can continue to produce without inputs to maximise our return per hectare."
The Pearts' breeding philosophy is shared by Amy's parents, Steve and Esmae Taylor, Moriah, Chinchilla, as well as Amy's sister and brother-in-law, Kate and Peter Moloney, Wetlands, Augathella.
The three families recently joined forces to offer their bulls for sale under the Rangeland Bulls banner.
"Dad has been breeding and selling bulls to neighbours and people in the area for years," said Amy, who grew up on Wetlands. "We have continued the breeding program with consistent selection traits, and along with Kate and Peter, and Steve and Esmae, we are now collectively offering the bulls for sale."
The 2015 sale will be held on September 11, via a Helmsman auction on property at Wetlands.
The sale day will also feature a presentation by RCS general manager David McLean, who will discuss issues such as what drives profit in a beef operation and the impact of cow size on performance and profitability.
Kenton said all the bulls on offer would be three years of age.
"Only 5 per cent of our overall male calves are retained as bulls, to compound the best performers throughout the herd," he said.
"All animals are assessed off grass."
Despite their obvious passion for breeding bulls, Kenton and Amy said their organic operation remained their key focus.
"Our bulls are selected for commercially relevant traits," Amy said.
"Some of the bulls offered have been used in our system as yearlings and/or two-year-olds, and we only offer animals we would be satisfied to use ourselves.
"We haven't set out to produce a large number of bulls.
"People see value in them because they know they can access the lead 5pc of our gene pool, but the main game for us is still the organic market."