Poll Dorset, White Suffolk and Southdown rams will be up for auction at the Yentrac Prime Lamb Sires annual on-property sale on September 25.
The Tatura stud's principal Rob McCartney said Yentrac used Stockscan and LambPlan as tools but a strong emphasis was placed on visual appraisal.
The stud also had another successful showing at major Victorian shows this year, which Mr McCartney said was a way to compare their stock with other breeders.
"Our focus is to breed strong virile rams with sound structure, plenty of meat, correct feet and legs and extremely clean heads," he said.
The sale will see 15 White Suffolk, 60 Poll Dorsets and 15 Southdown rams up for sale.
Inspection is from 11am on Wednesday, September 25 at 110 Craven Rd, Tatura, with the sale commencing at 1pm.
Lunch will be provided.