Guinea pigs typically live five to seven years, although with optimal care, some may live up to eight years or slightly longer. Their longevity is influenced by genetics, diet, environment, and quality of veterinary care. A balanced diet rich in Vitamin C, a spacious and clean habitat, regular social interaction, and preventive veterinary health checks can help ensure a Guinea pig's whole and healthy life. Owners need to commit to the long-term care these delightful pets require.