[header] How to keep cats out of your yard [title] Use a cat repellent to prevent cat litter. [step] These mixes are the best option against cats that use your garden as a litter box, and are available at most pet stores and on the internet. Shake the granules or spray the concentration near garden beds that are used as litter boxes. 
[substeps] The cat repellent usually uses predator scents to scare the cat into finding a new territory. Choose a non-toxic formula to reduce risk of hurting pets, children or plants.