Fence Wall Spikes
These specially designed fence wall spikes can offer a physical barrier to cats entering your garden or using your fence as a perch. Made in England these spikes are high quality and more effective than some of the cheaper imports. The spikes are legal if placed on a fence of at least 6ft in height. They are designed to be safe for cats and do them no harm.
To be effective you must of course cover all of your fence and not leave any areas where they can jump over such as from a shed or garage roof.
Being sharp these spikes are also a deterent to humans who may be tempted to climb your fencing.