Two sisters (not of earth) and their alien (pet) that is furry and long-limbed and spins cartwheels to move. The girls have blonde hair that changes color and have other powers. They may be from the moon or something and have run away and their parents/guardians have come to take them back. They end up at a cabin in the country where an older couple takes them in and the community accepts them and the pet (as an odd breed of dog). I have been trying to find this movie forever.