Is Insect Foggers & Bug Bombs Toxic to Cats and Dogs?
Bug bombs are moderately toxic to dogs and severely toxic to cats — fogger residue groomed off fur causes tremors and seizures in cats. Pets must be out during and after fogging.
Potentially life-threatening — treat any exposure as an emergency.
Can cause real harm — call a vet for guidance.
In an emergency, do not wait.
Medical disclaimer: This tool is for general information only and isnot a substitute for veterinary diagnosis or treatment. Toxicity depends on the amount, your pet’s size, and health history. If your pet may have ingested something harmful, contact your veterinarian or a poison control hotline ((888) 426-4435 / (855) 764-7661) immediately — do not wait for symptoms to appear.
What is Insect Foggers & Bug Bombs?
Bug bombs are moderately toxic to dogs and severely toxic to cats — fogger residue groomed off fur causes tremors and seizures in cats. Pets must be out during and after fogging.
Also known as: bug bomb, fogger, total release fogger, raid fogger, insect bomb, flea bomb, household fogger, bug fogger.
Symptoms to Watch For
🐈 In Cats
- Muscle tremors and twitching from grooming pyrethroid residue off fur
- Drooling, vomiting, and coughing
- Wobbliness, dilated pupils, and hiding
- Seizures in cats exposed to foggers containing permethrin or heavy residues
🐕 In Dogs
- Drooling, vomiting, and coughing if present during or right after fogging
- Watery eyes and breathing irritation from the fog
- Wobbliness or lethargy with heavy exposure
- Tremors in dogs exposed to wet residue or over-used foggers
What to Do If Ingested
- Remove the dog from the house immediately and get to fresh air.
- Air the house out thoroughly per the label (usually 2–4 hours minimum) before re-entry.
- Wipe down surfaces and wash pet bedding before the pet returns.
- Call a vet if coughing, drooling, or wobbliness persists after fresh air.
Steps apply to both cats and dogs. When in doubt, call a vet or poison hotline before acting. Have a cat? Run the Pet Poison Triage Wizard for cat-specific steps.
When to Call the Vet Immediately
Call your veterinarian or a poison control hotline right away if you notice any of these:
- The pet was inside during fogging or returned before the label interval
- Persistent coughing, vomiting, or drooling
- Tremors, wobbliness, or labored breathing
Frequently Asked Questions
Frequently Asked Questions
How long do pets need to stay out after a bug bomb?
Follow the label, but the usual minimum is 2 to 4 hours with windows open — and for cats, longer is safer. The bigger hazard for cats is not the airborne fog (they were out during that) but the residue that settles on floors, furniture, and bedding: cats walk through it and groom it off, delivering a pyrethroid dose. Wipe hard floors and counters, wash bedding, and vacuum carpets before a cat comes home.
Are foggers with permethrin worse for cats?
Yes — many flea-focused foggers use permethrin or other pyrethroids, and cats cannot metabolize them (see our permethrin and pyrethrins pages). A cat re-entering a freshly fogged house and grooming the residue can develop the same tremors and seizures as direct permethrin exposure. Choose a product explicitly labeled safe for homes with cats, and keep the cat out longer anyway.
My dog sneezed and drooled after we fogged, but we aired the house out. Is he okay?
Brief exposure to a fully aired-out house usually causes only transient nose and throat irritation that settles in fresh air. Call a vet if the drooling continues, if he develops coughing, vomiting, wobbliness, or tremors, or if he was actually in the room when the fogger went off — direct fog exposure is a different, more serious situation than post-airing residue.
Sources
This entry is reviewed against the following authoritative veterinary sources.
Last reviewed: 2026-10-16