Answer: The best way to deter cats is to put a barrier between them and the soil. The cats will learn quickly and you can remove the barrier in a few weeks. For flower beds, try crumpled chicken wire over the soil - cats don't like to walk on it. For potted plants, any object that will keep them from digging in the soil will work. Try laying old pantyhose or pieces of nylon netting over the soil. You can string fishing line between stakes around the garden bed, keeping the line 6 inches above the soil surface and criss-crossing the line so there's less than 12 inches between the lines. The cats will eventually learn to visit somewhere else, and you can remove the barriers after a few weeks.
Chemical treatments usually work for only a few days and then must be reapplied. I'm not familiar with Keytone so I can't recommend its use in a vegetable garden. Check the label on the product and use only in accordance with label directions.
Good luck with your problem!
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