I had a similar problem when I moved house. My new neighbour wasn't too pleased to have cats on her lawn etc. Cat repellent didn't work. What my wife and I did then was, we bought a pair of those high power water guns and when we let the cats (10 of them) out, we waited along our neighbour's fence and sprayed any cat that got near the border (didn't hit them directly though).
After about 3 days of this, it seems to have helped because our neighbour hasn't been over to complain again since.
Now the water guns are on standby because every now and then one or two of them may need reminding.
After about 3 days of this, it seems to have helped because our neighbour hasn't been over to complain again since.
Now the water guns are on standby because every now and then one or two of them may need reminding.
