For me the feather has several uses. It can tell us the condition of the bird that lost the feather. Was the bird predated, and by whom,but I also use feathers to get the attention of predators and have got a stoat to poke its head up for a look, and to bring fox much closer.
If you know where a fox lives, give the feather a go. Take it in your hand and rustle the feather in your hand.