I know how you feel Dale, have just cleaned up 5 cat poos from my flower boaders and 2 from my lawn(?) - whatever happened to cats burying their mess, the ones round here seem to be in competition.
The only thing I have found that works for any length of time is the lion dung thing, used it last summer and it was great, stopped the cat poo totally. Obviously over the winter it has worn away and it's time for another appilcation.

Wasn't there another post somewhere about using dead cats in your bean trench?
I wonder.......

__________________
Imagination is everything, it is a preview of what is to become.