In general most of our essential and fragrance oils are safe to be used as instructed in a water diffuser around pets. However we recommend researching which essential oils might harm pets, and using all essential oils in a well ventilated area. Please ensure they are not within reach of pets or children. If you have any concerns or irritation occurs, please consult your VET. For more information check out the link provided -
https://www.health.qld.gov.au/news-events/news/using-essential-oils-safely