Long-time International Dairy Week (IDW) exhibitor Bushlea Jerseys took the grand champion award in the Jersey judging on Wednesday.
The young cow Bushlea Van Fernleaf 10 won the cow, four years, in milk class before taking the best udder, senior champion and grand champion awards.
It was Bushlea's fourth grand champion Jersey at IDW.
Owner Wayne Kuhne said the four-year-old cow came out of the youngest section of the senior show.
The Fernleaf family was one of the stud's most prominent and had been a foundation family in the herd when it was established in 1945.
But this was the first Fernleaf to take a grand champion award.
Mr Kuhne said the cow, which had already produced three calves and was again in calf, produced a lot of milk.
Last lactation it produced more than 7500 litres, which was above the herd average of 7000 litres (600 kilograms of milk solids).
The Kuhne family milks 400 cows at Koonwarra, Vic.
They aimed to breed high-quality Jersey cows that were profitable.
"Jerseys are easy to work with; they are more profitable when you look at feed conversion and the amount they eat," Mr Kuhne said.
Judge Chris Lahmers, United States, said the cow won hands down.
"(She's) a cow you love the straightness of lines, the uphill run, the depth and openness of rib, just a beautiful mammary system as well," he said.
The intermediate champion Brookbora Valentino Fair Mavis, shown by Robert and Sandra Bacon, was bred on their Tennyson, Vic, farm from a cow family they have had for 40 years.
Mr Bacon said the cow was one that didn't cause any fuss in the herd.
The Bacons, including son Daniel who is involved in showing a number of cows, run 280 cows that "are bred for milk".
Mr Bacon said he liked good production cows that were efficient with good udders and lasted a long time in the herd.
"We're chuffed (to win) - you never know how you will go in a big show," he said.
The judge Mr Lahmers said the cow's dairy strength, openness of rib and depth of body made it the complete package.
Long-time exhibitors Philippa and Mark Flemming, Philmar Dairy Co, Tocumwal, NSW, took the junior championship with Miami Magnify Dawn 5206.
Mrs Flemming said it was the first time the stud had won a championship at IDW.
The calf was from a home-bred bull the Flemmings bought from a farm at Tamworth, NSW, they visited as part of a farm inspection tour at a Jersey Australia forum.
Mrs Flemming said the bull was from the Magnify family Philmar had bred 28 years ago.
The bull was run with the heifers after they had been artificially inseminated and this was one of its first daughters.
"We use a lot of AI, so to get one (a champion) from a home-bred bull is unusual," she said.
Philmar has a 600-cow split-calving herd.
Show cows and embryo transfer donors were run separately from the main herd from September.
Son Mitchell is a cattle fitter and worked on preparing the cows.
Mrs Flemming said livestock sales accounted for about 20 per cent of their operation's income with Philmar raising every heifer it breeds.
Showing helped build their profile.
"Other stud breeders buy lines of cows from us," she said.
Judge Mr Lahmers said he loved this great heifer, particularly its straightness of line.
Grand champion: Bushlea Van Fernleaf 10, Bushlea Farms, Koonwarra, Vic.
Senior champion: Bushlea Van Fernleaf 10.
Reserve: Rivendell Voltage Tammy Rivendell & Brunchilli, Nowra, NSW.
Intermediate champion: Brookbora Valentino Fair Mavis, R & S Bacon, Tennyson, Vic.
Reserve: Shirlinn Tequila Dawn, C Yarnold, T Wilson & N Lowman,
Junior champion: Miami Magnify Dawn 5206, Philmar Dairy Company, Tocumwal, NSW.
Reserve: Bellrose Tequila Lulu, N & E Strong, Jamberoo, NSW.
Premier sire: Tequila.
Premier breeder: Wilson Family, Shirlinn Jerseys, Tamworth, NSW.
Premier exhibitor: Rivendell Brunchilli