One mouse in a trap. New droppings near receiving. Feeding activity at an exterior bait station.
In the fall, it’s tempting to give all three the same explanation: rodents are more active this time of year.
Sprague’s service records show a recurring increase in documented rodent activity during October and November. But the explanation isn’t nearly that simple.
Start with the wrong explanation and the investigation can head in the wrong direction. The better question isn’t simply whether rodent activity is up.
Is more rodent activity normal in the fall?
Yes. But “normal for fall” doesn’t explain what is happening at your facility.
In Sprague’s 2022–2025 service-visit analysis, recorded rodent captures increased in October and November. The rate rose from about 78–79 visits with a capture per 1,000 service visits from May through September to 93 in October and 106 in November. November had the highest recorded rate in each of the four years reviewed.
Captures weren’t the only evidence recorded. Feeding signs, droppings and other observations also help Sprague teams understand where rodents may be active. Because the volume of recorded evidence can be affected by service coverage and documentation practices, those records are most useful alongside a facility’s own history.
Those benchmarks tell you when closer attention may be warranted. They don’t diagnose the cause at one location.
Your facility’s history, where activity is occurring and what kind of evidence is showing up are what make the seasonal numbers useful.
Does colder weather mean rodents are moving inside?
Not necessarily. Sprague’s records don’t show a simple fall shift indoors.
Both interior and exterior rodent-trap findings increased during October and November in Sprague’s service data. The records don’t establish a simple shift from outside to inside.
That doesn’t mean rodents aren’t entering buildings in the fall. Trap placement and monitoring practices influence what gets recorded.
It does mean “it’s getting cold” shouldn’t automatically be the explanation for new interior activity.
A new interior capture, repeated activity near receiving or increased exterior evidence may call for different questions and a different investigation.
Does one capture tell you what the problem is?
No. A capture is evidence. The context around it determines what it can tell you.
Droppings, feeding activity, gnawing, tracks and captures are different pieces of evidence. Where they appear, whether they repeat and which species may be involved can change what your pest management team investigates next.
Different kinds of evidence answer different questions. A capture confirms a rodent was caught; droppings, gnawing and feeding signs can help the pest management team understand where to investigate.
Feeding at a bait station or monitoring block can be recorded even when no rodent is seen or captured. Species identification based on signs may be incomplete, so context matters more than a guess about species.
A facility team doesn’t need to diagnose a species from a spreadsheet. The useful point is simpler: “rodent activity is up” isn’t enough information on its own.
WHAT SPRAGUE’S DATA SHOWS
Recorded rodent captures rose from 93 to 106 per 1,000 service visits, based on the 2022–2025 seasonal analysis. November had the highest recorded rodent capture rate in each of the four years reviewed. Feeding signs, droppings and other observations add context. Review them alongside your facility’s history and changes in conditions.
What if the obvious approach isn’t producing an answer?
Change the investigation when the evidence points somewhere else.
A Sprague investigation at a 500,000-square-foot food-processing facility shows what that can look like.
A major grocery retailer had found rodent droppings deep inside shrink-wrapped pallets of packaged food. From the outside, there was no visible damage to the wrapping.
Sprague’s team inspected the facility, strategically installed hundreds of snap traps and used non-toxic tracking powder around rack legs and posts.
They found nothing.
But the droppings and feeding patterns suggested a roof rat. So the team changed where it was looking.
Motion-activated trail cameras were mounted high on the pallet racks. On the first night, the cameras captured clear footage of a roof rat. With visual confirmation, snap traps were placed on the upper racks near the camera site. The rat was captured the next night.
The investigation eventually identified a gap of less than an inch around a roof support post near a storm drain. Sprague sealed the opening to prevent future access.
The investigation also explained how the pallets could appear undamaged. The rat climbed onto pallets before they were wrapped, slipped through the rounded corners of the packaging and burrowed deep inside to feed. Once the pallets were wrapped, there was little visible exterior evidence of what had happened.
What should your team pay attention to?
Look for changes in location, repetition, evidence and the conditions around the activity.
Those observations don’t diagnose the problem. They give your pest management team useful context for the investigation.
What should you ask your pest management provider?
Start with one question: Is this different from what you normally see here?
Then share what your team has noticed: where the activity occurred, whether it repeated, what the evidence looked like, what changed nearby and whether a previous correction is still holding. That context gives your pest management team more to work with than a capture count alone.
Seasonal benchmarks can show broader patterns in Sprague’s service data. Your own history helps show what is unusual for your facility.
Your facility team doesn’t need to diagnose the cause. It needs to capture the details that help the investigation start in the right place.
What is your facility’s rodent activity telling you?
A Commercial Facility Review can help identify potential pest vulnerabilities and give your team another perspective on what deserves attention.
Request a Commercial Facility Review
Already working with Sprague? Ask your Route Manager to review recent rodent activity and facility conditions with you.
About the data
Sprague reviewed recorded rodent findings from commercial service visits across its service area, using 2022–2025 data. Seasonal rates compare service visits with a recorded rodent capture per 1,000 service visits. These findings describe recorded detections, not rodent populations, and do not establish the cause of activity at an individual facility.
Service frequency, monitoring coverage, geography and documentation practices can influence recorded findings. Facility history and on-site investigation remain essential.