Gayle also recognises that fertility is paramount for a cow to become an old cow in the herd. Cows that don't get in calf don't stay in the herd very long.
Gayle hasn't found a Holstein bull that surpasses VH Sparky for daughter fertility, though VH Romello comes close. These bulls are rated at 6.3 DPR and 4.5 DPR in the USA system, and both are 117 in the daughter fertility index in the Nordic Total Merit index – NTM.
"Fertility and mastitis resistance are two of the biggest contributing factors that carry a cow through to old age," Gayle said. "Knowing that the Nordic farmer requires a vet to administer mastitis treatment, something we as farmers can do here in Australia, makes the data on health traits very real,"
In years past, the Clarks pursued rump correction, using some very white bulls, which led to a rising incidence of cancers, mostly eye or third eyelid cancers. Bulls like VH Leyton, VH Berosus, and VH Nader, which have mostly black pigmentation, have been able to reverse that trend.
Nordic genetics have also been an excellent outcross, providing significant relief from inbreeding.
Gayle is happy with the results after transitioning to VikingHolstein. "I needed smaller statured cows, and we like the fertility and calving ease," she says.
She is now handing the breeding reins over to her daughter Hayley, who uses X-Vik sexed semen on the herd. This has resulted in many Holstein heifers being born in the Autumn of 2024. Gayle's son Ethan, along with two other staff members, also works part-time on the farm.
"Hayley is a keen cow enthusiast, loves her animals, and her engineering background benefits the farm by way of sound decision-making," Gayle ends as she proudly passes the baton to the next generation.