Her father David Phillips continues to run the rest of the farm as a sheep and beef operation.
It was when Lydia, 28, went to Te Awamutu as a rural manager for the ASB Bank that she came across milking goat farms.
"I decided I wanted to do that but back in Hawke's Bay."
She and Sean, 29, spent a year learning the ropes on a Waikato goat farm as contract milkers. "It was a huge learning curve."
The couple returned home in 2014 to begin work on their own dairy farm as Lydia was pregnant with Harrison who is now 3. Then Max was born in December last year.
The couple had a fulltime nanny as they were building their shed and securing supply contracts but now that the hardest work has been done she takes fulltime care of the children.
The goats, which are housed in a roomy, airy shed all year round, are a saanen-toggenburg cross, with some nubian goats as well.
They are milked twice a day at 5am and 3pm. It takes about eight minutes to take slightly more than a litre each milking. The does produce an average of 3.3 litres of milk each a day and every two days a tanker collects 6500 litres and takes it to a plant in Hamilton where it is turned into whole milk powder to be sold to China.
They employ Andy and Natasha as their full-time staff with three casuals, Sean's mother, Lydia's cousin and a university student.
The goats are kept inside for ease of management. They are fed a mixture of grass and lucerne silage, palm kernel and a corn byproduct of beer making.
Their blood and milk are regularly tested to ensure their needs are met and their feed adjusted accordingly.
The shed has an earth floor with wood shavings which are renewed weekly.
Because they don't graze on grass internal parasites are not a problem and they are given an annual preventative treatment for lice.
Kidding, which begins in June, is the busy time with twins normal and quintuplets not unheard of.
The kids are hand-reared until they reach 18kg. The surplus buck kids are sold on for finishing and the does are mated once they reach 35kg.
Then they are milked until the early winter when they have a six-week break before kidding again.
The Batys love what they so. "I feel privileged to do this at our age"
Her next projects could include goat yogurt and cheese. "Watch this space."