Secondhand smoke is harmful to cats. Cats who smoke secondhand smoke are three times more likely to develop lymphoma than other cats, and cigarettes may also induce squamous cell carcinoma in the cat's mouth. Let cats also become smokers. Cats have a very sensitive sense of smell. Things with strong smells such as smelly socks and cigarettes can easily stimulate their olfactory nerves. Moreover, cats not only inhale smoke into their lungs, but also swallow smoke particles when licking their fur. Cats that live in an environment exposed to second-hand smoke for a long time have a higher chance of getting sick.

Methods to prevent cats from inhaling second-hand smoke:

1. Set up a smoking area. It is best to smoke on the balcony, where the smell can easily dissipate, or in another room as a smoking area to prevent cats from entering.

2. Use an air purifier. If possible, you can purchase an air purifier to maintain the air quality in your home.

3. Clean regularly. Practice hygiene regularly and keep it clean. Materials such as blankets at home are most likely to adhere to second-hand smoke particles. Try to put finished cigarettes or ashtrays out of reach of cats or clean them up promptly to avoid accidental ingestion.