Several repeat offenders are soiling our tiny lawn and also the border at the top.

This morning one dug a hole and filled it with soupy cat diarrhea. I am still retching.

I have tried sprays and dusts. I've also push bamboo skewers into the soil.

Serious suggestions only please.

Lion dung is the cat-shit-prevention equivalent of "have you tried local honey" so fuck off with that.