Owning a pet may do more than brighten your day. It could also help keep your mind sharp. A study from the American Academy of Neurology found that long-term pet ownership is associated with better cognitive health and happiness.

The study analyzed data from more than 1,300 adults in the University of Michigan’s Health and Retirement Study. According to CNN, the strongest benefits appeared among people who had owned a pet for five years or more.

Dogs and cats were the most common pets studied, but people who owned birds, fish, or reptiles also showed cognitive benefits, suggesting companionship in many forms can be helpful.

Researchers emphasize that the findings show an association, not proof of cause and effect. However, prior research shows pet ownership can reduce stress, blood pressure, and cortisol levels, which may support brain health.