Why, isn't the dog the best playmate that a boy can have? Did any one ever hear of Towser or Gyp being false friends? And the soft, dainty, cunning bit of a fluffy ball of a kitten who comes rubbing its downy sides against the tiny girl's skirts begging for a return caress, is there a play-fellow more lovable? And the squirrel who comes begging at the window for nuts; the bunny rabbit who snugg…