Answer: Pea gravel doesn't usually attract cats - except very desperate ones with nowhere else to relieve themselves. Now that you've moved the gravel to a new place, you shouldn't have problems with cats, especially if you remove whatever feces you find before you spread it out in your yard. After you've spread the gravel you can hose it down just to rinse any remaining urine from the surface. I don't think you'll have any more problems with it.
Q&A Library Searching Tips