Warm, wet weather is a mosquitos best friend. If your pet is going on a walk in the woods or frolicking in the yard on days when insects are swarming, you may wonder, “Can I put bug spray on my dog?”
The short answer is no. Do not use human bug sprays on pets. Cats and dogs are susceptible to mosquito bites, just like humans. And heartworm and West Nile virus (WNV) are legitimate concerns.
Heartworm passes from animal to animal by mosquito bites. A mosquito may bite an infected dog or cat and then carry the infection to the next animal they bite. It is more common for dogs to contract heartworms than it is for cats, but both animals are susceptible to it.
WNV is the most common illness transferred from mosquito to animal. The virus moves into the salivary glands, and dogs and cats can transfer WNV to each other and humans. Often, your pet may not even show signs of infection. Yet, the virus can cause other issues, including encephalitis and meningitis in pets and humans.1
While they might help humans avoid these illnesses, many insect repellents can be toxic for animals.
Let’s face it – nobody likes mosquitoes, especially when they’re bothering our four-legged companions I’ve seen my own dog swatting at flying pests during our evening walks, and I know firsthand how frustrating it can be to watch your pet suffer from these annoying insects You might be tempted to grab whatever bug spray you have in the cabinet and give your pup a quick spritz, but WAIT! This could be a dangerous mistake.
The Quick Answer: No, Don’t Use Human Bug Spray on Dogs
I’ll cut right to the chase – you should never use human bug spray on your dog. It seems like a simple solution, but human insect repellents contain ingredients that can be extremely toxic to our canine companions
When my neighbor’s dog got into their camping supplies and licked some DEET-based repellent, they ended up with an emergency vet visit and a very sick pup. Trust me that’s not a road you want to go down.
Why Human Bug Sprays Are Dangerous for Dogs bug sprays contain several ingredients that are harmful to dogs. Let’s break down why these products are so dangerous:
DEET Toxicity
DEET (diethyltoluamide) is the most common active ingredient in human insect repellents, and it’s also one of the most toxic substances for pets. If your dog is exposed to DEET, they might experience:
- Lethargy and depression
- Corneal ulceration
- Conjunctivitis (pink eye)
- Gastrointestinal problems (vomiting, diarrhea)
- Neurological issues including tremors and seizures
I once applied a tiny amount of DEET spray near (not on) my dog before I knew better, and even that small exposure caused him to drool excessively and act lethargic for several hours. It was a scary lesson learned!
Other Harmful Ingredients
Beyond DEET, there are several other ingredients commonly found in bug sprays that can harm your furry friend:
- Picaridin
- Citronella (in candles, plants, or other products)
- Garlic plants
- Geranium plants
- Marigold plants
- Citrus fruit peel
Even products marketed as “natural” can pose risks. For example, citrus-based repellents might seem safer than chemical options, but they can still cause skin irritation in sensitive dogs.
Essential Oils: Not the Natural Solution You Might Think
Maybe you’ve heard that essential oils are a safe, natural alternative to chemical bug sprays. Unfortunately, this isn’t always true for our pets.
Many essential oils that repel insects can be toxic to dogs, especially when concentrated. Tea tree oil, for instance, can cause serious liver damage in dogs. Even citrus oils, which are relatively safe compared to other options, should only be used after consulting with your veterinarian.
My cousin tried using a lavender-based “natural” repellent on her dog last summer, thinking it would be gentle. Within hours, her pup developed a nasty rash and needed medical attention. The vet explained that dogs’ skin absorbs these oils differently than human skin does.
The Risks of Mosquito Bites for Dogs
You might be wondering why you need to worry about mosquitoes biting your dog in the first place. After all, they have fur, right? Unfortunately, mosquitoes can still bite through fur, especially in areas where the coat is thinner, like the ears, nose, and belly.
These bites aren’t just annoying – they can transmit serious diseases:
Heartworm Disease
Heartworm is a potentially fatal condition transmitted through mosquito bites. When an infected mosquito bites your dog, it can transfer heartworm larvae into their bloodstream. These larvae then mature into adult worms that live in the heart and pulmonary arteries.
My friend’s retriever contracted heartworm after a camping trip where they didn’t use any protection. The treatment was expensive, lengthy, and painful for the poor dog. Prevention is MUCH easier than treatment!
West Nile Virus
West Nile Virus (WNV) is another mosquito-borne illness that can affect dogs. While many infected dogs don’t show symptoms, WNV can cause serious neurological problems in some cases, including encephalitis and meningitis.
The scariest part? Dogs can potentially transmit this virus to other animals and even humans, making protection even more important.
Safe Bug Protection Options for Your Dog
So if you can’t use human bug spray, what CAN you use to protect your furry friend? Thankfully, there are several safe and effective options:
Pet-Specific Insect Repellents
Veterinary-approved insect repellents made specifically for dogs are your best bet. Products like ADAMS™ Flea and Tick Spray are formulated with pet safety in mind while still effectively repelling mosquitoes, fleas, and ticks.
I’ve been using pet-specific repellents on my dog for years now, and they work great without any of the scary side effects of human products.
Protective Clothing
Believe it or not, they make protective clothing for dogs! Light-colored doggy t-shirts can provide some protection against mosquitoes, especially for short-haired breeds or dogs with sensitive skin.
Last summer, I bought my short-haired pointer a lightweight mesh shirt for our evening walks, and it definitely reduced the number of bites he got.
Environmental Control
One of the best ways to protect your dog from mosquitoes is to control these pests in your environment:
- Eliminate standing water in your yard (mosquito breeding grounds)
- Keep your grass cut short
- Use pet-safe mosquito traps or zappers in your yard
- Walk your dog during times when mosquitoes are less active (avoid dawn and dusk)
After I drained the birdbath that I kept forgetting to change and trimmed back some overgrown bushes, the mosquito population in my yard dropped dramatically.
Regular Heartworm Prevention
While not directly repelling mosquitoes, keeping your dog on a regular heartworm preventative medication is crucial for protecting them from the most serious consequence of mosquito bites.
What to Do If Your Dog Is Exposed to Human Bug Spray
Accidents happen. If your dog does come into contact with human insect repellent, take these steps immediately:
- If the product is on their fur/skin, wash the area thoroughly with mild dog shampoo and warm water
- Prevent them from licking the area
- Call your veterinarian or animal poison control right away
- Watch for symptoms like excessive drooling, vomiting, lethargy, or tremors
When my sister’s dog jumped up and knocked over a bottle of bug spray, getting some on his paws, she immediately washed them and called the vet. The quick action prevented any serious issues.
DIY Pet-Safe Repellent Options?
Some pet owners wonder if they can make their own safe repellents at home. While there are recipes online, I’d caution against DIY solutions without veterinary guidance. The concentrations and combinations of ingredients can be tricky to get right, and what’s safe for one dog might not be for another.
I tried making a “natural” repellent using apple cider vinegar and water, and while it didn’t harm my dog, it also didn’t seem to deter a single mosquito! Sometimes the professional products are worth the investment.
Special Considerations for Different Dogs
Not all dogs have the same needs when it comes to insect protection:
Puppies
Puppies have more sensitive skin and systems than adult dogs. Always use products specifically labeled as safe for puppies, and use them sparingly.
Senior Dogs
Older dogs may have weakened immune systems or pre-existing conditions that make certain products risky. Consult with your vet before trying new repellents on senior pets.
Dogs with Allergies or Sensitivities
If your dog has known allergies or sensitive skin, test any new product on a small area first and watch for reactions before applying it more widely.
My allergy-prone terrier can only use certain brands of pet-safe repellents – others cause him to break out in hives. It took some trial and error to find what worked for him.
A Word About Cats
If you’re a multi-pet household with both dogs and cats, be extra cautious. Cats are even more sensitive to insecticides than dogs. Never use dog products on cats unless they’re specifically labeled as safe for cats too.
ADAMS™ Flea and Tick Spray is formulated for both cats and dogs, making it a good option for households with both types of pets.
Final Thoughts: Protecting Your Dog While Enjoying Outdoor Time
Summer is too short to spend it inside hiding from bugs! With the right precautions, you and your furry friend can enjoy the great outdoors without worrying about pesky mosquitoes and the diseases they carry.
Remember these key points:
- Never use human bug spray on dogs
- Choose pet-specific products approved by veterinarians
- Consider environmental controls to reduce mosquito populations
- Keep your dog on regular heartworm prevention
- Call your vet immediately if exposure to toxic repellents occurs
Last summer was the first time I used a comprehensive approach to protecting my dog from mosquitoes – pet-safe repellent, yard maintenance, and protective clothing for evening walks. Not only did he have fewer bites, but I noticed he was much more eager to spend time outside without constantly swatting at pests.
Your pet relies on you to make safe choices for them. By using the right products and taking preventative measures, you can keep them comfortable and healthy all bug season long.
Have you found a particular method or product that works especially well for protecting your dog from mosquitoes? I’d love to hear about your experiences in the comments!

The Hazards of Bug Spray
Many human-formulated bug sprays contain DEET or diethyltoluamide. DEET is a common ingredient in over-the-counter insect repellents, and it is extremely toxic to pets. If you use these products, make sure your pets dont lick the bug spray off you. Side effects of DEET toxicity include lethargy and depression, corneal ulceration, conjunctivitis, gastrointestinal problems, and neurological issues, such as tremors and seizures.2
Heres a list of insect repellent ingredients to avoid:
- DEET
- Picaridin
- Citronella candles, plants, or other products
- Garlic plants
- Geranium plants
- Marigold plants
- Citrus fruit peel
Some of these ingredients have low toxicity compared to DEET, such as citrus, but they can cause skin irritation and other problems. If your pet comes into contact with these ingredients or shows signs of poisoning, call your vet or an emergency clinic right away.
Can I put bug spray on my dog and cat if the formula is made from essential oils? No, because certain oils can be very toxic, as well. While citrus oils, such as lemon or orange may be okay for dogs, its best to check with your veterinarian first because any natural oil could cause issues.3
As a rule, essential oils and cats dont mix. Tea tree oil, especially, should never be used on cats — whether in bug spray, a diffuser, shampoo, or other treatment — because it can cause liver failure. Its a good idea to consult with your veterinarian before using any essential oils on or near your cat or dog.
No, bug spray with DEET is not safe for your dog
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