Помогите образовать множественное число из слов : dog, fox, boy, sister, animal, game, photo, mouse, piano, fruit, hen, sheep, bear, big parrot, nice hat, horse, man, interesting book

Dogs ,foxs,boys , sisters,animals,games,photos,mouse,pianist,fruits,hens,sheep,bears,big parrots,nice hats,horses,men,interesting books.