Many pet owners prefer hiring pet sitters instead of the more traditional pet care options available. Some reasons cited for using a pet sitter are to prevent stress to the animal caused by a changing environment, travel trauma, contracting illnesses and parasites from exposure to other animals, not meeting vaccination requirements that may be necessary for kennelling, and to maintain regular routines and prevent the need to adapt to a new environment. It is also a solution for pets with health problems and mobility issues due to arthritis, dysplasia, incontinence, etc.