Guinea pigs are available through several small animal rescue groups.

• Wee Companions - San Diego, CA
• Orange County Cavy Haven - Orange County and Los Angeles, CA
• Angela's Rabbit & Small Animal Adoptions Los Angeles, CA
• Critter Corral Steger, Illinois (near Chicago).
• The Home for Unwanted and Abandoned Guinea Pigs, Atlanta. Not currently rescuing or adopting, but maintains a wonderful website with information about guinea pig rescue as well as guinea pig health and behavior.
• Cavy Companions, Washington State
• Guinea Pig Adoption Network List of adoptable guinea pigs throughout the world.