Cats have a terrible habit of digging a hole, crapping in a second place, and trying to cover it up in a third. Seeming to prefer my carefully prepared seed beds, or larger vegetable patch.
I used to put netting over my seed beds, but on two occasions 4' Grass Snakes got caught in it. One was dead and the other was not in a good way, but slithered off after careful release.
So I had to come up with something else.
An electric stock wire 6" off the ground surrounding the plot did not help as the cats (yes, plural) were seen hopping over.
I purchased electric sheep fencing and suspended it horizontally over the seed bed.
Cat no. 1 jumped onto the wire and then jumped near 6' vertically on the next pulse and then jumped away.
Cat no. 2 tried to squeeze underneath for some bizarre reason, but only got its head under before the shock.
They both grabbed it in their mouths on the second night!
It turned out to be very efficient against Pigeons as well.
Anon as there will be cat slaves (the cats let them say owners) who think that protecting my own hard work against damage from a free roaming Tiddles is barbaric.
I am not anti-cat - my daughter has a house cat. I am just anti them invading my garden and defiling it.