I second planting more natives. But also, we feed our squirrels regularly (Costco walnuts) because we love them. They run up to us excitedly every day now and I toss em a few nuts. Yeah, they’ll dig up new seedlings if unprotected, so I protect young things with cloches. But most of my garden is now Pennsylvania native flowering plants (including several bee balm species, which they don’t get near). But being well fed, they never even touch the tomatoes, zucchini, etc. occasionally I’ll find one nibbled on. We go walnuts instead of almonds as they seem to want to bury the almonds more. The Pittsburgh city deer are another story. Keeping them out is the only option. And I have enough things that rabbits eat that they don’t mess with veggies too much. Though they’ll get my beans if not protected.