Thanks Kelly

The same cat has been attacking Tipsy since she first arrived , before she was spayed . I'm wondering is she female and doesn't want another female as competition ??? Or she had our garden earmarked as part of her territory?

The visiting cat is actually a gorgeous cat, jet black with a beautiful coat and yellow eyes.

Whatever it is I suppose I'll have to continue with the water treatment. I don't pet the visiting cat as I don't want to encourage visits, but we have quite a number of felines passing through our garden. I found out recently that a neighbour behind me throws out food for cats , probably explains why Tipsy was first hanging around the place.