- (301) 829-0060
- Mt. Airy, MD
- info@pestshieldinc.com
Pest Shield, Inc. has provided residential mouse control across Frederick County since 2011, holding Maryland Department of Agriculture business license MDA #30263 and employing a team with over 75 years of combined pest management experience. Owner Troy Yowell has approximately 35 years in the industry and personally handles the majority of service calls — when you call, you’re talking to the person who will show up. Pest Shield carries a 5.0 rating across 338+ reviews on Google and HomeAdvisor, and has been recognized as Best of Frederick MD Pest Control (2021) and a Nextdoor Neighborhood Favorite four consecutive years.
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.
Most mouse problems announce themselves the same way: you find something that shouldn’t be there. A few dark pellets in a kitchen cabinet. Chewed corners on a cereal box. A faint scratching sound in the wall at 2 a.m. These are reliable indicators that Mus musculus — the common house mouse — has moved in, and that there are almost certainly more than the one you’ve seen.
New Market sits at the edge of Frederick County’s agricultural corridor, where wooded buffers and open farmland meet residential lots — many of them older properties along the historic National Road with stone or block foundations, wood siding, and decades of small gaps that have never been addressed. Every fall, as field crops are harvested and temperatures drop, mice that have been living outdoors begin moving toward warmth. They don’t need much of an opening: a house mouse can compress its body through a gap roughly the size of a dime. Gaps around utility penetrations, deteriorating door sweeps on garage doors, and cracks where wood siding meets the foundation are common entry points in this area’s housing stock.
That seasonal pattern — predictable, annual, tied to the agricultural surroundings — is why a single interior treatment often doesn’t hold. The mice that were inside are gone, but the conditions that let them in haven’t changed. Next fall, the cycle repeats.
60+ years of combined experience. Tell us what you’re seeing — we’ll come look, no obligation.
Mice!! We moved into our new house only to find it infested with mice. Contacted Home Advisor and they sent me Troy from Pest Shield and less than 30 days later…..no mice. Troy is a very geniuine and honest guy. He wont try to over-sell you on things that you don’t need and his goal is to rid you of the problem ASAP. He was very prompt and followed up as promised 30 days after the first visit. Prices are reasonable and his services for mice were covered for a full year with one payment. Look no further, these are the guys you want taking care of your pest!! Thanks Troy!!!
Robert R · March 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 →
pest shield has done an incredible job. 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 →
General pest & rodent control
Every job starts with a free property inspection — no treatment recommendation before Troy or a technician has actually looked at the property. The inspection covers the exterior perimeter, foundation, utility entry points, garage, and any interior areas where activity has been reported. The goal is to understand how mice are getting in and where they’re active, not just to confirm that they’re present. If the picture isn’t clear from field inspection alone, Pest Shield has entomologist Jeffrey Allwine on staff for species-level identification when it’s needed.
Pest Shield’s approach is exterior-first: treatment focuses on the perimeter and entry points rather than the interior of the home. As one long-term customer put it, “Pest Shield doesn’t even come into the house!” — and that’s by design. Keeping product outside the living space is both more effective (it addresses where mice are entering and traveling) and better for families. Professional-grade baiting products are used — not glue traps — placed in locations inaccessible to children and pets. EPA-approved products are standard; nontoxic options are available for households with specific concerns, and Troy is documented advising customers on precautions around treated areas before he leaves.
After initial treatment, a follow-up visit is scheduled — typically around 30 days — to confirm results and, where the inspection identified specific entry points, to seal them from the outside. Entry point sealing is a distinct follow-up service: it closes the gaps that made the property vulnerable in the first place, rather than leaving the underlying access points open for next season.
For New Market homes that face recurring fall and winter rodent pressure, Pest Shield offers the Standard Care Plan: treatment every 60 days on a bi-monthly cadence, with complete exterior treatment focus and a 100% effective guarantee. If mice reappear between scheduled visits, Pest Shield returns at no charge. The plan doesn’t require you to be home for treatment. It’s offered when it genuinely makes sense for the property — Troy is straightforward about recommending against it when a one-time treatment is all a situation calls for. Homes dealing with rat activity alongside mice may need a separate assessment, as the two rodents often require different baiting strategies.
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.
New Market sits along the old National Road corridor in eastern Frederick County, roughly between Frederick and Mount Airy, with quick access via US-40 and I-70. The town’s historic core includes properties dating back generations, and its edges give way to subdivisions that back up to farmland, wooded lots, and the rolling terrain typical of this part of the county. Pest Shield serves New Market and the surrounding Frederick County communities from its base in nearby Mt. Airy.
The combination of older construction and agricultural surroundings creates predictable fall rodent pressure in New Market. When fields are harvested and temperatures drop, mice move toward structures — and homes with stone or block foundations, wood siding, or aging utility penetrations give them plenty of ways in. For broader pest control in New Market, the same seasonal pressures that drive mouse activity also bring other pests indoors. The Standard Care Plan’s 60-day cadence covers the full rodent entry season from September through March without leaving gaps between treatments.
Pest Shield’s approach is exterior-first — treatment focuses on the perimeter, entry points, and the areas where mice are traveling and entering, which keeps product out of your living space. Interior treatment is applied when the inspection shows it’s genuinely needed, but in many cases it isn’t. Professional-grade bait stations are placed outside in locations inaccessible to children and pets, rather than inside cabinets or along baseboards where your family moves around.
Pest Shield uses EPA-approved products, and nontoxic options are available for households with specific concerns about children or pets. Bait stations are placed in locations inaccessible to kids and animals. Troy is documented advising customers on precautions around treated areas before leaving — if there’s anything specific to your household, he’ll address it directly during the inspection rather than leaving you to figure it out afterward.
It depends on the property. A single treatment — followed by a 30-day follow-up and entry point sealing — is often sufficient for a contained problem. But New Market’s agricultural surroundings mean fall rodent pressure is a recurring annual event, not a one-time fluke. For homes that face that kind of seasonal pressure, Pest Shield’s Standard Care Plan (60-day bi-monthly cadence, exterior-focused, 100% effective guarantee with free retreatment between visits) maintains protection through the full rodent entry season. Troy will tell you honestly whether your situation calls for ongoing service or whether a one-time treatment is all you need — recommending against a plan when it isn’t warranted is a documented pattern, not a sales pitch.
Same-day and next-day service are the norm. Pest Shield is based in nearby Mt. Airy, and Troy or a technician has been documented arriving the same day a call comes in — including Sundays, at no extra charge. If you have an active mouse problem, call (301) 829-0060 and describe the situation; scheduling is handled directly, without a dispatcher or call center in between.
Pest Shield will tell you. Recommending against unnecessary service is one of the most consistently documented patterns in the company’s reviews — Troy has been documented telling customers they don’t need a plan, advising them to wait, and providing honest second opinions that contradicted expensive recommendations from other companies. The Standard Care Plan is offered when it genuinely benefits the customer. If a one-time treatment and entry point sealing is all your situation calls for, that’s what you’ll hear.
