The main penitentiary in Santiago, Chile, known as “the Pen,” has a unique population of around 300 stray cats that have lived there for decades. Initially brought in or self-wandering, the cats have become integral to the prison community. Inmates informally adopt, care for, and build relationships with the cats, providing a source of companionship, responsibility, and affection. The presence of the cats has positively impacted the mood and behavior of the inmates, fostering a sense of connection and responsibility.

The prison’s warden acknowledges the positive effects, citing the challenging and hostile nature of prisons. This unconventional relationship between inmates and cats has similarities to formal programs connecting prisoners with animals, which have been implemented globally, particularly in the United States. Such programs have shown benefits in reducing recidivism, improving empathy, and fostering positive relationships between inmates and prison officials.

A decade ago, the cat population faced challenges like uncontrolled expansion and illness, causing stress for both inmates and cats. In 2016, volunteers from the Felinnos Foundation, in collaboration with Humane Society International, began caring for the cats, spaying, neutering, and treating them. Inmates actively contribute to the program by identifying cats needing care and bringing them to the volunteers. The success of the program is evident in the declining cat population and improved conditions for both inmates and feline residents.