Adopt a Guinea Pig
Find your new companion with personalized support, thoughtful matchmaking, and an adoption experience brought right to your home. Whether you're a first-time guinea pig owner or a longtime enthusiast, we're here to help.
Apply to Adopt →
Our Adoption Service Area
In-home adoption visits are available exclusively in San Mateo County, San Francisco, and Santa Clara County , plus the following Alameda County communities: San Leandro, Hayward, Castro Valley, Union City, Newark, and Fremont.
How Adoption Works
Meet Our Guinea Pigs
Browse the available guinea pigs below and discover your potential companions.
Submit an Application
Tell us about your home, enclosure, and what you're looking for.
Get Ready
Once your application is approved and your enclosure is ready, we'll arrange your adoption visit.
Meet Your Matches
We'll bring suitable guinea pigs to your home, answer questions, and help with introductions to a resident guinea pig when applicable.
Welcome Them Home
Once you've found the right match, complete the adoption agreement and fee, and welcome your new companion!
Not Quite Ready to Commit?
Our foster-to-adopt program gives you up to 30 days to make sure guinea pigs are the right fit for your home and lifestyle before making a permanent commitment. We're here to provide guidance and support throughout the process.
Why Adopt from Running Out of Hay?
Personalized In-Home Matchmaking
We bring suitable guinea pigs to you, help with introductions, and work to find the right match for your family.
Individualized Care
Guinea pigs receive health assessments and ongoing monitoring while in our care, with veterinary treatment provided when needed. Every guinea pig is microchipped.
Lifetime Support & Returns
We're here to help long after adoption day. If circumstances change, guinea pigs adopted from us can always return to our care.
Ongoing Care & Resources
From care advice to low-cost grooming and bonding services, we're here to support you and your guinea pigs.
Ready to Get Started?
Whether you're ready to adopt or would prefer to start by fostering, we'd love to hear from you. Both applications help us learn about your home and find the right fit.
Not sure which application to choose? Either is fine! We can discuss adoption, fostering, or foster-to-adopt options together.
Meet Our Adoptable Guinea Pigs
Browse the guinea pigs currently looking for loving homes. Availability may change as animals are adopted or enter foster care.