A Gippsland-based dairy operation dominated the Ayrshire results at International Dairy Week on Tuesday.
The grand champion Rockvale Burdette Prim was exhibited by Jake Mathews, while his mother Anthea Day and her husband Trevor Saunders exhibited the intermediate champion Aruluen Park Jumper Pam.
The animals are all run in the one herd in the family's operation at Shady Creek, Vic.
The family has bred Ayrshires since the early 1900s.
Five-year-old Rockvale Burdette Prim was bought by Mr Mathews as a pick from a pen of heifers when Max Hyland dispersed his renowned Ayrshire herd.
Prim has already tasted major success at IDW, being named interbreed intermediate champion and Ayrshire grand and intermediate champion in 2017 as a three-year-old.
Ms Day said she was a great all-round cow, in the top of the production indexes for Mr Mathews's cows.
"She's no fuss, she doesn't get any special treatment, she's just a really good cow," she said.
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Judge Gregory Evans, from New York state, United States, said the cow had tremendous strength.
"This cow wears a phenomenal mammary system, she moves around the ring with such elegance and grace," he said.
The intermediate champion three-year-old Aruluen Park Jumper Pam was from a family that Mr Saunders had bred for more than 30 years.
"We just love the cow, she milks really well and just ticks all the boxes for us," Ms Day said.
"Her mother was an awesome Poker that we had a lot of fun with.
"She won up here as well, so that's the second generation winning up here."
Ms Day said it was amazing for the family to come away with two championships.
She said she liked Ayrshires because they were hardy cows that were easy to get in calf, with really good health traits.
The junior champion was shown by Bridget Liebelt, Torlea stud, Murray Bridge, South Australia.
Ms Liebelt only bought Regal Park Sicking Shower a few weeks ago from David Mayo's Regal Park Ayrshires, Gerringong, NSW.
"I've had an eye on this (Regal Park Shimmer) family for a very long time," Ms Liebelt said.
"They've had a lot of really good cows come out from that family.
"They're just a really outstanding family from NSW and I wanted to bring that family back to SA to play around with and breed from."
Ms Liebelt has a small stud of three Ayrshires and 10 Holsteins that run in the herd of her employer David Altman.
She won her first Ayrshire when she was 11 when showing at the Adelaide Royal Show.
Ms Liebelt said the win "crazy".
"I can't believe it, I didn't expect this at all," she said.
AYRSHIRE HONOUR ROLL
Grand champion: Rockvale Burdette Prim, Jacob Mathews, Shady Creek, Vic.
Senior champion: Rockvale Burdette Prim.
Reserve: Boldview Dream Peril, Lucy Newman, Prospect Hill, SA.
Best udder: Parkville Burdette Katie, James Dillon, Waaia, Vic.
Intermediate champion: Araluen Park Jumper Pam, Araluen Park, Shady Creek, Vic.
Reserve: Paschendaele Forever Gigi, Eagles Partnership, Gooloogong, NSW.
Junior champion: Regal Park Sicking Shower, Bridget Liebelt, Murray Bridge, SA.
Reserve: Ayrborne RD Tornado, B Hentschke and C Liebich, Glencoe, SA.
Watch all the action from the Ayrshire judging