Texas A&M University – Veterinary Medicine & Biomedical Sciences:

https://vetmed.tamu.edu/news/pet-talk/a-scent-sitive-subject-essential-oil-diffusers-and-your-cat/?highlight=essential+oils

The Meowing Vet- a quirky veterinary website for cats, dogs, & the responsible pet owner who wants to know more:

https://themeowingvet.com/2021/03/12/are-essential-oils-safe-for-dogs-and-cats-a-collaboration-with-24petwatch