What Happens If a Dog Smells Mothballs?
Pet owners must be aware of the hidden dangers household items can pose to their furry companions. Mothballs, commonly used to protect stored clothing from insects, pose a notable risk to dogs through ingestion, inhalation, or skin contact. Understanding the implications of exposure, especially when a dog merely smells mothballs, is crucial to ensuring your pet’s safety.
What Are Mothballs?
Mothballs are solid pesticides used to kill moths and their larvae, usually stored with clothing and fabrics. They are available in various forms such as:
- Balls
- Cakes
- Powder
- Flakes
These products typically contain one of the following chemicals:
- Naphthalene: Older and more toxic variant.
- Paradichlorobenzene (PDB): Common in modern mothballs due to a slightly better safety profile.
- Camphor: Less common but still hazardous.
How Smelling Mothballs Affects Dogs
Dogs are naturally curious and may sniff mothballs stored in open containers or incorrectly used outdoors. While ingestion is the most common route of poisoning, simply inhaling the vapors can be harmful. Mothballs emit strong, volatile chemical fumes, which can irritate a dog’s respiratory tract.
Naphthalene vapors, in particular, are highly toxic. Although the effects may not be as immediate or severe as ingestion, prolonged or intense exposure to the fumes can result in:
- Respiratory issues, such as labored breathing
- Lethargy and weakness
- Gastrointestinal discomfort
- Mild neurological symptoms in sensitive dogs
Signs of Mothball Toxicity from Inhalation
Pet owners should watch for a range of symptoms if they suspect their dog has smelled mothballs:
- Vomiting
- Diarrhea
- Lethargy or apparent fatigue
- Abdominal pain
- Trembling or seizures in severe cases
- Discolored gums (pale, brown, or yellow)
- Mothball odor on breath or coat
Risks Based on Chemical Composition
The risks vary depending on the type of mothball involved:
- Naphthalene: Most toxic; exposure risks include GI symptoms, anemia, liver and kidney damage, and even death in case of ingestion.
- Paradichlorobenzene (PDB): Slightly less toxic than naphthalene but still harmful, especially in large doses or with chronic exposure.
- Camphor: Less common, but may lead to agitation, vomiting, and seizures.
Factors Influencing Toxicity
- Duration of exposure: Longer periods of smelling mothball vapors can increase toxin accumulation.
- Dog size and health: Smaller dogs or those with pre-existing conditions are at higher risk.
- Ventilation: Poor air circulation exacerbates vapor toxicity.
What to Do If a Dog Is Exposed
If your dog smells or is exposed to mothballs, take the following steps immediately:
- Move your dog to fresh air: Reduce further exposure to vapors.
- Observe for symptoms: Monitor behavior and physical condition.
- Consult a veterinarian if symptoms appear or exposure was significant.
Do not induce vomiting or administer any treatments unless advised by a vet. Bring a mothball sample or packaging to assist in treatment planning.
Diagnosis and Veterinary Care
A vet may perform various diagnostic tests, including:
- Physical examination
- Blood work
- Urinalysis
- X-rays (if ingestion is suspected)
Depending on the level of toxicity, treatments may include:
- Intravenous fluids
- Activated charcoal (under vet supervision)
- Medications to manage symptoms
- Oxygen therapy
- Blood transfusions in severe anemia cases
Long-Term Effects and Prognosis
There is no antidote for mothball poisoning. The outcome depends on the type and amount of chemical, duration of exposure, and speed of treatment. Left untreated, exposure may result in:
- Permanent liver or kidney damage
- Neurological issues
- Death
Prevention Tips
- Store mothballs in airtight containers out of pet’s reach.
- Never use mothballs to repel outdoor pests such as snakes or rodents.
- Dispose of mothballs properly according to label instructions.
- Use non-chemical alternatives like sealed storage or pheromone traps.
Conclusion
Mothballs are deceptively dangerous to pets, even when not ingested. Simply smelling mothballs can cause serious health issues in dogs due to the toxic vapors they release. Always use these substances with caution, following all label instructions, and consider safer alternatives to protect both your belongings and your beloved pet.





