You might try something like this: https://predatorguard.com/products/expel-natural-animal-repellent-spray-32-oz
I write articles for that company and that spray works for rodents and squirrels, and several other animals as well. It's all natural, so it won't hurt any of them, they just don't...
Oh my gosh, I'm so sorry! There are a ton of cats in my area too, and I even wrote an article about keeping cats out of your yard. You could check it out if you're interested. It's geared towards people who have cats coming into their gardens, but these tactics should help, no matter what...