A dog !!!

Ha Ha soemthing cats or dogs to that that dont like the smell.

Nothing worse if you go to garden and you find cats poo

I used to use 6x fertiliser on the beds and noticed that my cat wouldn't even walk over them. Then I read somewhere that they hate it. It's aromatic alright with whiffs of the farmyard but I loved the pungent aroma. My dog does a great job now!

Lion dung? Some zoos supply it and it apparently works very well. Stinks more than cat poo but at least you know where you put it and can steer clear!

Seriously, the only thing I've found that works is to put down holly or rose clippings, they don't like the thorns in their paws.