Although local freezing works are in full swing, finding local labour is proving difficult because prospective employees are failing drug tests.
Silver Fern Farms' Takapau plant is at peak production with farmers offloading stock due to the big dry, says plant manager Laurie Davies.
"The workers are on daily overtime and working Saturdays - we are managing to keep up with it as best we can."
To help cover the extra shifts people have come from other sites, he says.
"Unfortunately, when we work on Saturdays there's not enough of our people who are available to cover the shifts, or they do not want to work the extra time.