Yep eventually something will get them, I like to let mine outside of their fenced area but I have to be with them we are surrounded by woods and I know there are preds just waiting for the chance. Old age is good I've got 3 that are over 10yrs old now.he died of old age really because he had went through several flocks because something always got them at night but after a while he got old I guess and couldn't get away from predetors like he used to but now I got new ducks its been a while since I had some and there in a pen although I do love when the ducks were lose