Due to inadequate holiday and leave records it was not possible to know the extent to which other employees did not receive their holiday and leave entitlements.
The labour inspectorate found of the 17 people Kenel employed between September 2018 and September 2019, only one had an employment agreement.
Furthermore, the wages and time records lacked sufficient detail, making it impossible to tell whether workers had been paid at least the minimum wage.
The Employment Relations Authority determined that the breaches were intentional, saying Kenel "took no steps throughout his history as an employer in New Zealand to familiarise himself with his legal obligations" and had been "wilfully blind".
It noted record-keeping, as well as being a legal requirement, was "central to building productive employment relationships".
Labour inspectorate dairy sector strategy lead Callum McMillan said the dairy farming industry was a focus area for the labour inspectorate.
"It's not enough that employers take a passive approach to compliance with employment standards. Employers have a responsibility to get the basics right no matter how long they've been operating."