Sydney Sweeney says her dog is vital to her “self-care process”. The ‘Anyone But You’ actress, 26, who is also a fitness fanatic, opened up about how essential she finds her pet in keeping her mental check in order while adding she also loves to unwind by reading and downs water to stay healthy. Sydney told People: “My dog, Tank, really is so important in my own self-care process. Whether it is just playing with her, taking her to the dog park or taking her on a walk, it just lets me take a moment and unplug from everything else.” She added about her other methods of relaxation: “Usually I’m r…