- (301) 829-0060
- Mt. Airy, MD
- info@pestshieldinc.com
Pest Shield, Inc. (MDA #30263) has served Brunswick and Frederick County homeowners since 2011, with a team carrying over 75 years of combined pest management experience. Owner Troy Yowell brings approximately 35 years in the field — including pest management work on U.S. military bases in Iraq and Afghanistan — and leads the majority of service calls personally. Pest Shield holds a 5.0 rating across 338+ reviews on Google and HomeAdvisor, and has been recognized as Best of Frederick MD Pest Control (2021) and Best of Nextdoor for four consecutive years. Every new client relationship starts with a free property inspection before any treatment is recommended.
How it works
Four steps. No surprises. Same answer whether it's your first call or your tenth.
You reach Troy or someone on his team directly. No call center, no dispatcher, no routing.
Same-day or next-day for most calls. Emergency stinging-insect situations and real-estate WDI deadlines get priority.
We identify the species, locate entry points, and find the source — not just the symptom.
Written recommendation, straightforward pricing, no obligation. If you don't need treatment, we'll tell you.
Rats are rarely seen directly — what homeowners notice first is the evidence they leave behind. Brunswick’s older housing stock, river-adjacent lots, and proximity to agricultural land create conditions where rat pressure is higher than in newer suburban developments, and where the structural vulnerabilities rats exploit are more likely to exist. Knowing what to look for is the first step toward resolving the problem.
Brunswick’s conditions amplify these risks in specific ways. The town’s Victorian-era and mid-century homes often have aging mortar, deteriorated foundation sills, and utility penetrations that were never properly sealed — gaps that rats can exploit with openings as small as a half-inch. The Potomac River corridor and surrounding farmland support large rodent populations year-round, and as temperatures drop in fall, those populations move toward the warmth and food sources that residential structures provide. A rat problem in Brunswick rarely resolves on its own: without identifying and closing the entry points, new animals will continue to enter even after existing ones are eliminated.
60+ years of combined experience. Tell us what you’re seeing — we’ll come look, no obligation.
We had used other companies who were unsuccessful at getting rid of mice. Pest Shield doesn’t even come into the house! Since Pest Shield started working at our house, we have not had any problems at all! Robert is terrific.
Ira Polon · October 2021 Read on Google →
Troy from Pest Shield was the only representative to fully understand rodent (mice) control. He baited our attic & basement w/ mice bait. He is coming back in 30 days to confirm the results. The other 2 companies, Fogle & Triangle wanted to get rid of all our attic insulation, bait & put in new insulation at a cost of nearly $5,000.
Cheryl Piazza · July 2014 Read on HomeAdvisor →
Troy was very knowledgeable, professional, courteous, and prompt. They eliminated my mice problem and came out for follow up visit to seal off any entry points from outside. Very reasonably priced for the service provided. Used top notch products, instead of just sitting out glue traps. Highly recommend them.
Kevin Smith · February 2016 Read on HomeAdvisor →
General pest & rodent control
Pest Shield’s approach to rat control starts with a thorough exterior inspection before any treatment begins. Troy or a technician walks the property, identifies how rats are entering — foundation gaps, utility penetrations, damaged soffits, deteriorated door sweeps, gaps where pipes or conduit enter the structure — and explains the findings in plain language. The goal is to understand the full picture before recommending a course of action. As documented across dozens of customer reviews, that inspection sometimes leads to a recommendation to do less than expected; it never leads to a recommendation to do more than is warranted.
Treatment uses professional-grade baiting — not glue traps. Pest Shield’s exterior-first approach means the primary treatment focus is outside the home, which keeps chemical exposure out of living spaces. Interior treatment is applied when the situation calls for it, but the emphasis is on intercepting rats before they reach occupied areas of the home. Bait stations are placed strategically along identified travel routes and entry zones, and the approach is calibrated to the specific conditions of the property.
| Phase | What Happens | Timing |
|---|---|---|
| Free Inspection | Troy or a technician inspects the exterior and any relevant interior areas, identifies entry points, and explains findings before recommending treatment | Same day or next day in most cases |
| Initial Treatment | Professional-grade baiting deployed along identified travel routes and entry zones; exterior-first approach keeps treatment outside living spaces where possible | At inspection or shortly after |
| Follow-Up Visit | Confirms eradication, refreshes bait stations if needed, and seals identified entry points from outside | Typically 30 days after initial treatment |
| Ongoing Protection | Standard Care Plan — 60-day bi-monthly exterior treatment, 100% effective guarantee, free retreatment between visits if activity reappears | Bi-monthly, no need to be home |
The follow-up visit is where entry point sealing happens — after initial treatment confirms results, Pest Shield returns to close the gaps from outside. This is a documented part of the process, not an add-on. Customers have described Troy identifying entry points that other companies missed entirely, and using professional-grade products rather than the glue traps that leave the underlying problem unaddressed.
After initial treatment and follow-up, most customers whose properties face ongoing rodent pressure — particularly in Brunswick’s older homes near agricultural and riverine habitat — find that enrolling in Pest Shield’s Standard Care Plan is the practical answer to keeping rats out long-term. The plan runs on a 60-day bi-monthly cadence, focuses on complete exterior treatment, and includes a 100% effective guarantee with free retreatment between scheduled visits if pest activity reappears. You don’t need to be home for scheduled visits. The reactive-to-recurring shift is the difference between solving the immediate problem and maintaining a property that rats don’t re-enter.
Pest Shield’s products are EPA-approved, and the exterior-first approach is specifically designed to keep chemical exposure out of living spaces. For homes with children, pets, or other safety considerations, nontoxic options are available — Troy addresses these concerns directly during the inspection and explains what’s being used and why.
Owner
Founded Pest Shield in 2011 after years as a pest management contractor on U.S. military bases in Iraq and Afghanistan. Around 35 years in pest management. Personally handles or leads the majority of service calls.
Pest Management Specialist
Field technician handling residential and commercial service calls across Frederick, Carroll, and Montgomery counties.
Pest Management Specialist
Field technician handling residential and commercial service calls across the service area.
Our Entomologist
Consulting entomologist on species identification, conducive conditions, and treatment strategy for difficult cases.
Brunswick is a small Frederick County town on the north bank of the Potomac River, roughly 15 miles southwest of Frederick along US-340. The surrounding area is a mix of wooded ridgelines, active and fallow farmland, and the Potomac River floodplain — all of which support substantial rodent populations year-round. Pest Shield serves Brunswick and the broader Frederick County corridor, including New Market, Middletown, Urbana, and Walkersville.
Brunswick’s older housing stock — much of it built during the town’s railroad era — presents the structural conditions rats exploit most readily: aging mortar joints, deteriorated foundation sills, and utility penetrations that predate modern sealing standards. The river corridor’s humidity accelerates wood decay and gap formation. As agricultural fields turn in fall, rodent populations that spent summer in open land migrate toward residential structures for warmth — and Brunswick’s location at the edge of that agricultural-to-residential transition makes it a consistent pressure point for rat activity each season. Homeowners dealing with this recurring pressure often benefit from pest control in Brunswick that addresses the full range of seasonal pest threats alongside targeted rodent management.
The clearest indicators are size and evidence scale. Norway rat droppings are roughly ¾ inch long — about three times the size of mouse droppings — and capsule-shaped with blunt ends. Gnaw marks from rats are larger and deeper, and burrow openings (2–3 inches in diameter) along your foundation or under a deck are a rat sign, not a mouse sign. Grease trails along baseboards and wall edges are also more characteristic of rats, which follow fixed routes repeatedly. If you’re hearing heavy thumping or scratching sounds rather than light scurrying, that’s another indicator of the larger animal. If you suspect you may have mice rather than rats, a free inspection from Pest Shield will confirm the species and the scope before any treatment is recommended.
Yes — Pest Shield’s exterior-first approach is specifically designed to keep treatment outside living spaces, which limits exposure for everyone in the home. Products used are EPA-approved, and for households with children, pets, or specific health concerns, nontoxic options are available. Bait stations are placed in locations inaccessible to pets and children. Troy addresses safety questions directly during the inspection and explains exactly what’s being used and where — customers with young children and pets have consistently noted this as part of how Pest Shield handles the conversation.
Initial treatment — baiting, follow-up confirmation, and entry point sealing — resolves the active infestation for most homes. Whether ongoing service makes sense depends on the property. Brunswick homes near agricultural land, wooded lots, or the Potomac River corridor face persistent rodent pressure that doesn’t disappear after one treatment cycle; new animals will continue to test the perimeter as long as the surrounding habitat supports them. For those properties, Pest Shield’s Standard Care Plan (60-day bi-monthly exterior treatment, 100% effective guarantee, free retreatment between visits if activity reappears) is the practical answer to keeping rats out long-term. Troy will tell you honestly whether your property warrants it — he’s documented across dozens of reviews recommending against ongoing service when a one-time treatment is genuinely sufficient.
Entry point identification happens during the initial inspection — Troy or a technician walks the exterior of the property looking for foundation gaps, utility penetrations, damaged soffits, deteriorated door sweeps, and any opening large enough for a rat (roughly a half-inch or larger). Sealing is handled as a follow-up service after initial treatment confirms results, so the work is done once the infestation is under control rather than before. The sealing is performed from outside, which is consistent with Pest Shield’s exterior-first approach. Customers have described Troy identifying entry points that previous companies missed entirely.
Same-day and next-day service are standard for active infestations. Brunswick falls within Pest Shield’s Frederick County service area, and Troy or a technician can typically schedule an inspection the same day you call — including Sundays, at no extra charge, for urgent situations. The fastest way to get a straight answer about what’s happening in your home is to call (301) 829-0060 directly; you’ll speak with the people who will actually do the work, not a dispatcher or call center.
