My neighbor came over today to say that our cat has been getting into their house through the cat flap or through open windows & eating their cats biscuits (they have 2, one male & one female) & is now spraying, causing damage.It has been going on for a month or so apparently.
Our cat (Jasper) is approx 8 years old & we have two other female cats (all well natured together)Jasper has been neutered. We do have a very aggressive cat very close next door at our other neighbors & I am wondering if this is why our cats behavior has changed.Jasper does not spray in our house tho.All very strange. I have suggested that the neighbor with the problem shuts her cat flap from now on & windows when she goes out but is there anything I can do to help my cat from spraying over there.

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FLIK