Posted: 23/05/2017 at 13:49
We have had a nightmare too, terrace house and 2 cats to left and 4 in 3 houses to right.
It got really bad when our previous neighbours left taking their 2 cats who only pooed indoors in their trays, but did sit in our garden (territory?). Tried sonic scarers - some success, grapefruit and orange peel - no success, gel - no success, smelly plants - no success.
What did work was holly trimmings stuck end up in the bed over winter (ouch). As the spring came we piled on loads of well rotted horse manure (damp and smelly) kept the holly spikes and edged the bed with chicken wire. Touch wood nothing has happened for at least 2 months. Plants are now filling the spaces but I do have to remember to cover any areas on pots until the plants grow bigger.
I read that it helps if it can be cleared up quickly and sprayed so they forget where to go. The cats still do come in the garden but just to drink out of the watering cans now.
It is soul destroying sometimes. Will look up the water scarecrow , my friend had huge success with a water spray box in her horses door that kicked, so it is an effective deterrent.
Don't give up