Mangakakahi woman Shaq Harpur said her partner, Dion Carlton, discovered the small piece of wood inside a spicy chorizo sausage from a packet they bought at a Rotorua Countdown.
Countdown says it is taking the matter seriously and investigating.
Harpur, a 24-year-old daycare centre teacher, said they bought the sausages from Countdown Fairy Springs in mid-September but only got round to cooking them for dinner last week.
"We purchased the sausages about a month ago and had them stored in the freezer until we pulled them out to cook them."
Carlton, a 24-year-old chef and maintenance worker, had "bitten into it" and suffered a "minor cut on the inside of his cheek" but would be okay, she said.
"We wouldn't even feed them to our dogs, so we just threw the sausages out."
"They gave me a refund and let me pick a free meat pack," she said.
A Facebook post about the find has already been shared more than 50 times with comments saying how "crazy" it is.
"It looks like a mouldy toothpick," one person said.
The discovery follows Tauranga mother Faria Jahan finding an earwig in the pre-packaged fruit salad she was about to give her pre-schooler earlier this month.
A Countdown spokesperson said food safety was its utmost priority and it took complaints such as this seriously.
"This customer has contacted us directly and we're currently investigating with the supplier to see what's happened."
