A long-established dairy farming family in Queensland's Mary Valley has received a new opportunity to continue supplying milk after its previous processing contract ended.

The Rozynski family, which has been involved in dairy farming in the Mary Valley for more than 80 years, operates two farms near Imbil on the Sunshine Coast hinterland. The family has around 600 Brown Swiss cows and produces approximately 10,500 litres of milk each day.

The family's previous milk supply contract was not renewed, creating uncertainty about where its milk would be processed after the contract ended on September 15.

Kenilworth Dairies has now stepped in to purchase and bottle part of the family's milk under a new single-origin product called One Farm, One Herd.

The product is being developed using milk sourced exclusively from the Rozynski family's Brown Swiss herd. The aim is to give consumers a direct connection between the milk they purchase and the farm where it was produced.

The new arrangement is expected to provide an important market for part of the family's production, although the family says it will not immediately solve all of its financial challenges.

Kenilworth Dairies owner John Cochrane became involved after learning about the family's situation. The business plans to bottle some of the milk while the remaining production is being directed to other processing arrangements.

Some of the remaining milk is expected to be processed in northern New South Wales into ingredients for the Australian manufacturing and export markets. That milk is expected to generate less income than fresh drinking milk but could provide an interim option while the family looks for additional long-term processing arrangements.

The new One Farm product is expected to reach selected retailers and outlets from late September, although distribution details were still being finalised when the story was published.

The development comes at a difficult time for Queensland's dairy industry. Industry representatives have highlighted the long-term decline in the number of dairy farms across the state and the challenges faced by producers dealing with processing contracts and market conditions.

For the Rozynski family, the new arrangement provides a pathway to continue operating its farms while building a new customer market for its locally produced milk.

The family has said public support for the new product will be important to its future. If demand grows, the One Farm product could potentially provide a larger and more sustainable market for the farm's milk.

The new milk will join Kenilworth Dairies' existing range of products sourced from farms in the Mary Valley.

The announcement provides a significant development for the Sunshine Coast hinterland's agricultural community, where dairy farming remains an important part of the region's rural economy.