I HAVE TWO DUCKS (DEWEY AND SQUEAK) WE GOT THE WEEK BEFORE EASTER AND THEN WE GOT TWO MORE BABY DUCKS WHO ARE ABOUT 4 WEEKS OLD NOW (LEWEY AND HEWEY) WE NEED TO PUT THEM TOGETHER IN THE SAME PEN. NOT SURE OF THE SEX OF THE TWO YOUNGER ONES AND WE TAKE THEM OUT DAILY AND PUT THEM WITH THE OLDER ONES BUT TODAY WE LEFT THEM THINKING WE WERE NO WHERE TO BE SEEN AND DEWY WENT AFTER THE LITTLE ONES BITING AT THEIR WING.. IS THIS COMMON AND HOW DO I STOP IT. I DONT WANT THEM HURTING THE LITTLE ONES. THE BABIES ARE PEKIN DUCKS AND DEWEY IS ALSO A PEKIN AND SQUEAK IS A RUEN DUCK... PLEASE HELP..