
Cats have a much stronger sense of smell than humans, with 200 million odour sensors in their noses compared to our five million. This means that what may be a mild and pleasant smell to us can be overwhelming for a cat. Cats are also very sensitive to smoke, and exposure to smoke is the leading cause of asthma in cats. Inhaling smoke can cause upper respiratory issues such as watery eyes, coughing, sneezing, and congestion, and can even lead to respiratory failure and death. Therefore, while some sources claim that burning incense around cats is safe, most advise against it, and recommend keeping cats out of the room until the smoke has cleared.
| Characteristics | Values |
|---|---|
| Effect on cats | Cats have a much stronger sense of smell than humans. What is a mild and pleasant odour for humans can be overwhelming for cats. |
| Cats are sensitive to smoke and can have upper respiratory issues like watery eyes, coughing, sneezing, and congestion. | |
| Cats have died from respiratory failure from inhaling too much lavender. | |
| Precautions | If you must burn incense, ensure good ventilation and keep your cat in a different room. |
| Safer alternatives | Pet-friendly candles, air purifiers, baking soda, and Febreze. |
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What You'll Learn

Cats' heightened sense of smell
Cats have a heightened sense of smell, with almost 40 times more odour-sensitive cells than humans. This sophisticated olfactory system is a cat's most reliable tool for gathering information about their environment. They use it to communicate with other cats, and sometimes with humans, by depositing their scent to make an environment or object more familiar. For example, when a cat rubs against you or new objects in the home, they are depositing their scent to make it smell more familiar and reassuring to them.
This powerful sense of smell is also one of a cat's best hunting tools, allowing them to identify prey long before they suspect any danger. A cat's sense of smell is so strong that they can detect their food even when it is well-hidden. Their sense of smell is so acute that they can detect higher frequencies and determine where a sound is coming from by sensing differences in the time of arrival and intensity of the sound.
The whiskers on a cat's face and front legs are also key to their sense of smell. They act as touch receptors, helping cats to measure distances accurately and detect the position of their prey. They also help cats navigate at night, acting as a type of radar.
Because of their heightened sense of smell, cats can be sensitive to strong scents and smoke. Incense, in particular, is known to be harmful to cats due to the smoke it produces. Cats are very sensitive to smoke, and it can cause upper respiratory issues like watery eyes, coughing, sneezing, and congestion. If your cat has asthma, exposure to smoke can be life-threatening. Therefore, it is recommended to keep cats out of the room when burning incense and to ensure proper ventilation to air out the smoke before letting your cat back inside.
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The dangers of smoke inhalation
Cats have a very sensitive sense of smell, and they are also very sensitive to smoke. Smoke from incense can be dangerous to cats and should be avoided. If you must burn incense, it is best to keep your cat in a different room, or even outside, and ensure your home is well-ventilated.
Smoke inhalation is a serious issue that can affect not only cats but also humans. Smoke inhalation occurs when harmful particles and gases produced by fire are breathed in. This can lead to a lack of oxygen and chemical irritation in the respiratory tract and airways. The heated particles and gases in smoke can cause eye irritation and burns, skin discolouration, coughing, and in more serious cases, respiratory distress syndrome and respiratory failure.
Smoke contains harmful substances such as carbon monoxide, which is the leading cause of death in smoke inhalation. Carbon monoxide reduces oxygen levels in the body and can be particularly dangerous for pregnant women as the unborn baby retains more carbon monoxide than the mother. Other harmful chemicals found in smoke include hydrogen cyanide, hydrogen sulfide, sulfur dioxide, ammonia, hydrogen chloride, and chlorine. These chemicals can cause swelling and airway collapse, and the high temperature of the smoke can burn the airways.
Symptoms of smoke inhalation include coughing, shortness of breath, hoarseness or noisy breathing, headache, nausea, and vomiting. If someone is showing symptoms of smoke inhalation, it is important to seek immediate medical attention and not leave them alone. Tests such as chest X-rays, pulse oximetry, and blood tests may be performed to assess the severity of smoke inhalation.
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Asthma and other respiratory issues
A case study found that daily incense burning contributed to shortness of breath and worsened respiratory dysfunction in a patient with asthma and COPD. The authors of the study also noted that incense combustion contributes to air pollution and can be a fire hazard.
Burning incense has been linked to various respiratory issues, including upper respiratory signs like watery eyes, coughing, sneezing, and congestion. These symptoms can be especially problematic for individuals with pre-existing respiratory conditions, such as asthma. In fact, exposure to smoke is the leading cause of asthma in cats, and if the incense contains added oils or fragrances, it may further increase the risk of respiratory problems.
To mitigate the potential health risks associated with incense burning, it is recommended to use alternative methods to achieve a pleasant-smelling living space. Some alternatives to traditional incense burning include electric incense devices, aromatic vapors, simulated visuals, and improved ventilation. Additionally, it is advised to keep cats in a different room, ideally at the opposite end of the house, while burning incense and to ensure proper ventilation to allow the smoke to escape.
Overall, while incense burning may be a popular practice, it is important to be mindful of the potential health risks, especially for individuals with asthma and other respiratory issues, as well as for the well-being of cats and other pets in the household.
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Essential oils and other toxic ingredients
Cats have a highly developed sense of smell and sensitive physiology. They are also unique in that they lack a crucial liver enzyme called glucuronyl transferase, which helps metabolize and eliminate certain substances from the body. This makes them more susceptible to toxicity from certain essential oils.
Essential oils, derived from aromatic plants, have become popular for their potential therapeutic benefits. However, cat owners must exercise caution and knowledge when exposing their feline friends to these oils. Tea tree oil, for instance, is highly dangerous for cats and can cause skin irritation and toxicity if ingested. Other essential oils that should be avoided include peppermint, thyme, spearmint, rosemary, nutmeg, and wintergreen.
Some essential oils are considered safe for cats in moderation. These include chamomile, lavender, cedarwood, marjoram, frankincense, and valerian. The recommended dilution ratio for cats is very low, typically around 0.1% to 0.5% essential oil in a carrier oil like jojoba oil or coconut oil. It is important to only apply diluted oils to a cat's bedding, collar, or blanket, rather than directly on the cat, as oils can be absorbed through their skin and pose a poisoning risk.
In addition to essential oils, cats can be exposed to toxic substances through incense burning. Incense smoke can be dangerous to a cat's health, causing respiratory problems and irritation to the lungs. It can also trigger scent overwhelm, which can be unpleasant for cats due to their sensitive sense of smell. While it may be possible to burn incense with cats in the house, it is crucial to take necessary precautions, such as ensuring proper ventilation and keeping cats in a separate room.
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Pet-friendly alternatives
Cats have very sensitive respiratory systems, and incense smoke can be harmful to their health. Therefore, it is best to avoid burning incense around cats. If you want to make your home smell nice, there are several pet-friendly alternatives you can try.
One option is to use pet-friendly candles made with non-toxic materials like soy wax, coconut wax, beeswax, or vegetable wax. These candles burn cleaner and longer than paraffin candles and are safe for pets. However, it's important to keep them out of your cat's reach and never leave them unattended to prevent accidents.
Another alternative is to use natural air fresheners made from ingredients like baking soda, vinegar, and citrus peels. These can effectively keep your home smelling fresh without exposing your cat to harmful chemicals. You can experiment with different combinations of pet-safe ingredients to find a scent you like.
You can also try using pet-friendly essential oils in a diffuser. However, it's important to consult a veterinarian before using essential oils, as some may be harmful to cats. Proper dilution and ventilation are crucial when using essential oils, and they should never be applied directly to your cat's fur or skin. Some essential oils that are safe for cats include lavender, marjoram, cedarwood, clary sage, valerian, frankincense, ginger, chamomile, and myrrh.
Additionally, air purifiers can help eliminate pet odours and sanitize the air by removing germs and allergens. This can be a safe and effective way to improve the smell of your home without using incense.
Finally, regular cleaning can go a long way in keeping your home smelling fresh. Sweeping, mopping, dusting, and washing linens regularly can help reduce pet smells and improve the overall cleanliness of your space.
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Frequently asked questions
Inhaling incense smoke is not great for cats and can be harmful to their health. Cats are sensitive to smoke, and exposure to it is the leading cause of asthma in cats. If your cat already has asthma or another respiratory condition, you should avoid burning incense.
Cats have 200 million odour sensors in their nose, compared to a human's five million. So, while you might not think the smell of your incense is too strong, it will be super intense for your cat. If your cat hates incense, they might try to move away from it. They might also show signs of stress, such as watery eyes, coughing, sneezing, and congestion.
If your cat hates incense, there are some alternative ways to make your home smell nice. You could try pet-friendly candles, air purifiers, or Febreze. You could also try putting baking soda or an air-purifying plant in a jar with a perforated lid and placing it near any smelly areas.
Burning incense around cats is not recommended. However, if you must, there are some brands with incense products that are advertised as pet-friendly, such as Gonesh Best Friends Purrrfect Pet Incense Sticks. Make sure to always burn incense in a well-ventilated room that your cat doesn't have access to, and keep your cat in a different room until the smoke is gone.











































