Diatomaceous earth (DE) is generally safe for cats when it is food-grade and used properly. The food-grade form of DE is non-toxic and works mechanically rather than chemically. It can be used for pest control on cats and may also help with internal parasites when ingested in small amounts. However, it is very important to avoid inhalation of the fine powder, as it can irritate the respiratory system. Additionally, only food-grade DE should be used—pool or filter-grade DE is toxic and unsafe for pets. Cats should receive limited quantities, and very young or small cats should be given less or avoided altogether. Always consult a vet before using DE on or for your cat.

Key safety points:

• Use only food-grade diatomaceous earth.
• Avoid the cat inhaling the powder.
• Use in small, controlled amounts if ingesting.
• Consult a veterinarian before use.

In summary, food-grade diatomaceous earth is considered safe for cats with proper precautions, mainly avoiding inhalation and overuse.