The current study aimed to explore (a) reactions of individuals with dementia to an interactive robotic cat and their relatives' and professional caregivers' experiences, and (b) to measure usability in developing the care/treatment of individuals with dementia using interactive robotic pets. An intervention design in a pilot study using mixed methods was conducted in two stages: a quantitative single-case study (n = 4) and a qualitative interview study (n = 14). Results indicated less agitated behavior and better quality of life for individuals with dementia. Interviews showed positive effects by providing increased interaction, communication, stimulation, relaxation, peace, and comfort to individuals with dementia. The tested interactive robotic cat was also considered easy to use. There is an increased need for alternative/complementary forms of care to meet an increasing number of individuals with dementia. For some individuals with dementia, an interactive robot, such as a robotic cat, can increase well-being and quality of life.