Companion Animals

Guinea Pig Ovarian Cysts

Ovarian cysts are extremely common in unspayed female guinea pigs and can cause significant welfare problems.

Key Facts

Up to 76% of female guinea pigs develop ovarian cysts by 3 years of age
Symptoms include hair loss on flanks, irritability, and swollen abdomen
Cysts cause hormonal imbalances and discomfort
Surgical spaying or hormone injections are treatment options
Many guinea pigs with cysts go undiagnosed until symptoms are advanced

Welfare Considerations

Ovarian cysts often cause chronic hormonal discomfort and skin changes. Spaying eliminates the risk entirely, but even hormonal management improves welfare for affected sows.

What You Can Do

Consider spaying female guinea pigs to prevent cyst development
Watch for bilateral flank hair loss as a common early sign
Have your vet perform a physical exam and ultrasound if cysts are suspected
Discuss hormonal treatment options with your vet if surgery is not appropriate
Raise awareness among guinea pig owners about this very common condition