Posted: 09/12/2013 at 11:37
Physical barriers are the ONLY way to stop them. The skewers or bamboo canes will work nicely. Any sprays or the like will wash away and are a waste of money and time. Buy some cheap bamboo canes and place them around the area where they walk and they will clear off, especially if they are pooping in a flower bed.
I stand by my method. Cats like to poop where there is open ground. A bare winter border is perfect for them. All you need to do is put lots of bamboo or sticks or whatever to physically stop them from getting to bare earth areas. You can remove them as bulbs/perennials grow. Simple, cheap and from experience effective.
You are wasting time and money on smells (it washes away after a few hours), gadgets (why bother spending £40?)