Hi- we have a saltwater river in our backyard and was thinking of raising white peaking ducklings; we would like them to mix with our chickens in the coop. Once the ducks are full grown, will they go to the river but come back at night to coop to sleep? We don't want them to become river-meat and we want them to enjoy life! Also, is it okay to mix chickens and ducks in the same coop? Thanks- any information is helpful -I haven't done any research yet!