A pet nanny traditionally provides care for cats and dogs. Other house animals may also be cared for by a pet nanny. In some instances, he may also be hired to care for less traditional pets, such as reptiles or amphibians. To be a successful pet nanny requires a unique mixture of people and animal skills. Pet owners are comprised of a distinctive cross section of people. They are all ages and come from assorted ethnic and socioeconomic backgrounds, factors that significantly affect their relationships with their pets.

Pets, much like their owners, also have distinct personalities and needs. Based on these factors of diversity, a pet nanny is required to be flexible and non-judgmental. Despite his feelings of how a pet should be treated or what the animal should be fed, he is typically expected to follow the wishes and directives put forth by the owner. This may only require following simple directions for preparing food or be a complex ritual for how and where a pet should be exercised.