You can use filters to find some cat and dog free homes. In the filters page, click on See more filters at the bottom and scroll down past two other filter categories. You will find an Allergens heading including cat free and dog free filters, as well as other allergy-related filters. Not everyone completes this section when filling out their home profile, so homes that do not indicate these features may also be pet-free. Ultimately, it would be best if you asked the host about the pet status of their home to assess your personal risk. Some people forget to remove those filters when they obtain pets.