HOPE for Animals will neuter 100 male cats for free Saturday from 8 a.m. to noon for residents in the 46774 ZIP code.
Pets will also receive a rabies vaccine and a microchip.
The event was made possible thanks to an anonymous donor.
To make an appointment, call 420-7729.
Those wishing to sponsor a similar event should call HOPE public outreach coordinator Katie Policinski at 420-SPAY (7729), ext. 110.