When there's an overabundance of homeless cats or dogs, we're known to spay & neuter as well as euthanize. As a former homeless I hope you wouldn't wish that on anyone.
Gonna add this technical tidbit here.
I just thought of using a hydraulic ram pump. The hydraulic ram pump is a pump that requires no electricity but can generate a lot of free kenetic energy through the "water hammer" phenomena. This is done using a running water source and a metal one way valve that will at some point occlude the water supply, turning all the kinetic energy into pressure.
That pressure can be redirected towards a spiral mechanism that propells a group of magnets through a copper coil.
We know that when a magnet is pushed between a copper coil, this creates electricity.
Using hydraulic ramp pump, we can harness that kinetic energy and move magnets through a wheel to generate free electricity.
This is called the ram pump magnet generator (rpmg) patented by red exorcist 2025