Animal Poisons and Repellents

There’s a large market for various types of animal repellents and deterrents but most are not successful or effective. We always recommend trapping and physical removal of animals as the most effective way to ensure the animals do not return. 

We’ll go over a few different repellents and explain why we find them ineffective.

The Different Types of Animal Repellents

Ultrasonic Devices/Noise Makers

These devices produce different sound frequencies depending on the animals they are intended to repel. They use frequencies higher than 20 kHz/kilohertz or lower than 20 kHz. On some devices, the user can adjust the frequency.

The sound is intended to irritate pesky critters and prevent them from creating their living spaces close to where the noise originates from.

The issue with these is that they can be audible to certain individuals depending on their age and hearing sensitivity. These noises can also disturb your household pets or nearby household pets. It’s also not a humane method, some scientific studies have shown that animals react to a rise in body temperature rising or seizures. Then, the animal may pass in an enclosed space which leads to a tricky animal extraction. 

Ultimately, scientific studies completed on ultrasonic devices have no control group; there is no concrete scientific evidence to back up their efficiency. Many customers we have talked to mention they have tried the ultrasonic device and it did not solve their issues.  On some occasions, we have seen bats hanging off of ultrasonic devices! 


By looking at the low reviews of many different repellent sprays, one can see that these are ineffective. Most liquid repellents are used for types of gardening and planting. Repellent sprays are supposed to make the animal so uncomfortable in a space the animal would normally be comfortable at that they leave and find a new residence. 

One of the biggest issues with sprays is that you will need to continue purchasing them and they do not keep animals away permanently. Often, the offending animals keep returning to the areas they find to be optimal living spaces hoping the repellent has worn off. More often than not, the repellents are ineffective even for short-term use. 

To keep animals from returning, we always suggest physical removal of the animal and exclusion to keep the animal from returning. By sealing off potential entry points around homes, sheds, decks, etc then the animals are not provided with an opportunity to exploit the area.  


The most common issue we see with poisons is that animals will often die from the poison and become trapped in a small area. They emit a foul odor and depending on where they wedge themselves, it’s a costly repair. Especially, small rodents like mice and rats that often become trapped in walls after ingesting poison. 

If this does or has happened, we do offer the removal of dead animals.

The Bottom Line

In conclusion, we always recommend the physical removal of all animals followed by exclusion and remediation. Give us a call or use our contact form if you’re noticing animals in or around your home!

7 Signs You Should Call an Animal Removal Professional

We’ll highlight some telltale signs that you might need assistance from an experienced wildlife technician

1. Seeing an animal in your home, or around your porch, garden, or shed.

If there is a bat present in your home, it may indicate a maternal colony living in your attic! Furthermore, it informs us there are entry points, or weak spots, around the exterior of your home allowing the bats to enter. Squirrels enter through unprotected chimneys or chew through components of the home. Other common animals lurking around your property include raccoons, opossums, mice, and birds.

2. Noticing damaged elements around your home.

Fascia, wooden components, gutters, and vents are a few examples that are exploited by a variety of animals.

3. The presence of animal droppings or nesting materials in the home.

Many animal droppings are highly hazardous, and cleanup should be handled by a professional wildlife technician. Moreover, bat droppings (guano), mice droppings, and opossum droppings are just a few common examples we often observe inside homes.

4. Burrows or tunneling in your yard or garden.

Moles and voles are usually responsible for tunneling and burrowing. In addition, moles will tear up your yard and create a large mess of molehills throughout your yard, destroying grassroots and plant roots along the way.

5. Pets sprayed by a skunk multiple times.

This usually indicates a skunk or a family of skunks are living on or near your property. For skunk removal, we only use traps and methods approved by the PA Game Commission.

6. Trash dug through on multiple occasions

The culprits behind this are usually raccoons or opossums, they will eat anything! Opossums also carry EPM which affects the spinal cords of horses.

7. Chirping or scratching sounds coming from attics or walls.

Bats, squirrels, and mice are just a few animals that cause noises like this in your home. Mice can get into walls and in some cases, trapped. Bats often cause scratching and chirping noises.

DIY Animal Removal Mistakes

When an unexpected visitor enters your home, there are many ways to react.  Unless you have had professional training, you may make some typical mistakes when removing animals.

Here are some common mistakes many homeowners make while attempting nuisance animal removal.

Infographic of DIY Animal Removal Mistakes

About our professional removal process

At Backyard Wildlife Solutions, we find trapping to be the most effective method of removal for most animals. Furthermore, all of our traps and methods are approved by the Pennsylvania State Game Commission. We also use proper equipment and techniques during clean-up to prevent the spread of bacteria and disease. During repair, we use a practical approach that includes matching materials to your home’s aesthetic.

Overall, DIY methods of animal removal can be dangerous. Feel free to call us or use our contact form to receive assistance from a licensed wildlife technician.