Ovarian cysts affect the majority of unspayed female guinea pigs over 18 months, causing pain, hormonal disruption, and significant welfare impacts that are often overlooked.
Ovarian cysts in guinea pigs represent a significant but frequently unrecognised welfare issue. The high prevalence means this condition should be considered for any female guinea pig over 18 months. Pain from large cysts can be substantial, manifesting as reduced interaction, hunched posture, and reluctance to move. Many owners attribute these signs to normal ageing rather than a treatable condition. Both surgical and hormonal management options offer good quality of life improvements when diagnosed and treated appropriately.