My parents recently got a guinea pig and she has made a huge difference in their lives. My parents are getting old and recently retired and somewhat lost about how to fill their days. They have a dog and a cat, but the guinea pig interacts with them on a different level. They wake up to "Pinky Pig" chattering at them, telling them she's ready for her morning lettuce treat. Every time the refrigerator door opens, she lets them know that she would sure appreciate a little snack. She jumps and plays and frolics and makes them smile. I've heard of pet therapy, where pets are used to heal, but I never considered a guinea pig for this. She is the perfect pet for my elderly parents. Her noises fill a somewhat quiet house with cheer and fun.