Due to the demand for a shedding sheep with extra frame and structural correctness, lines of Ultra White composites (Known as Glen Park Whites) and pure Ultra White sheep are being bred on Glen Esk Station.

In 2014 Glen Park purchased the top priced ram at the Hillcroft Farms on property Ultra White Sale. Another ram was purchased in 2015. At the 2016 Hillcroft Farms sale a further seven sires were purchased. Since then numerous sires have been purchased carrying Ultra White genetics.

Glen Park joined approximately 1000 White Dorper Ewes to Ultra Whites, to lamb in 2017. 

In addition, 100 Pure Bred Ultra White ewes have been purchased in 2021 to join the foundation 50 pure bred ewes that were purchased and mated to produce the first purebred Ultra Whites at Glen Park in June 2017. We currently have over 400 Pure Bred Ultra White Ewes in our breeding program.

The Ultra White is a shedding breed developed by Dawson Bradford of Hillcroft Farms, that is stabilised at 75% White Dorper and 25% Poll Dorset.

Currently the Glen Park Whites are carrying 87.5% White Dorper and 12.5% Poll Dorset.