The Usual Culprits: Rodent Hot Spots in Food Facilities

Rodents rarely arrive without leaving clues behind.

Unlike some pests that can establish themselves quietly, rodents often provide early warning signs long before one is actually seen. A torn ingredient bag. Droppings along a perimeter wall. Gnaw marks around a pipe. Light showing beneath a dock door. Small issues like these can signal much larger vulnerabilities.

Outside the building, overflowing dumpsters, spilled garbage and overgrown vegetation can also create food and harborage that increase rodent pressure before pests ever reach the facility.

“Rodents are a little easier to remediate because you have a lot more indications, even when they’re not visible,” said Marc Fintz, director of business development at All Natural Products Davidovich Bakery in New York City. “If there’s a rat issue, you’ll know about it quickly.”

Marcos Salinas said facilities also should keep an eye on seemingly routine issues that can quickly become pest attractants, including damaged ingredient bags, open trailer doors, missing traps and deferred maintenance.

“You have to get to the early warning signs,” said Salinas, food safety and quality assurance manager at Magi Foods in Schertz, Texas. “If you see something going on, deal with it right away.”

Beyond the inspection, Fintz said facilities should constantly look for worn door sweeps, gaps around plumbing and electrical penetrations, light visible beneath rolling doors and openings shared with neighboring businesses.

“Just because you don’t have them doesn’t mean your neighbors don’t,” he said.

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“It’s important to have good communication with your technician,” said Janelle Rinehart, head of food safety for a Midwest condiment manufacturer. “Usually, the technician is the one finding them before we notice they are in the facility.”

Rinehart conducts monthly sanitation inspections looking for gaps, cracks and openings while her pest management technician independently inspects the facility twice each month.

Communication goes both ways. Her technician alerts the team when exterior bait stations show increased feeding activity, allowing them to respond before rodents move closer to the building.

“At least they’re feeding there and not wanting to get into the building,” she said.

Salinas also meets regularly with his pest management professional, reviewing trend reports, inspection photos and corrective actions. Weekly communication helps identify subtle changes before they become larger issues.

“They’ll let us know, ‘You might want to move this trailer,’ or ‘Make sure this door is locking,’” he said. “Those extra steps when it comes to controlling pests — they can only do so much. It takes effort on our end.”

Michael Scott, QA director at Polidori Sausage in Denver, said that collaboration extends to every employee. His facility’s pest management provider visits twice a month, while the QA team inspects traps three times each week and reinforces pest awareness through annual food safety training and daily team huddles whenever concerns arise.

“If I see any activity at all — whether it be rodents or anything else — I call,” Scott said. “Our rep is very responsive.”

He said one of the biggest risks comes during receiving and shipping, when doors are frequently opened and closed.

“Sometimes they like to leave the doors open for the truck drivers so they can go in and out,” Scott said. “That creates a whole opportunity.”

To reduce that risk, every inbound and outbound trailer is inspected for cleanliness and debris before unloading begins. The facility also routinely checks door seals, dock risers and building openings during internal audits.

“I think the biggest thing with any facility is making sure your doors, your dock doors and the risers for the dock doors are properly sealed,” Scott said. “A mouse can get in a hole the size of a pencil.”

Ultimately, the strongest rodent prevention programs are built around communication, shared accountability and a commitment to addressing small issues before they become larger food safety risks.

And the system works for Scott. “In the three years I have been at this facility, we have had zero rodent activity inside,” he said.