how dig of an area if its a garden or something like that my family always fenced and also put bas of human hair that they get local barbers to gather for them around after it hangs a month or so give or take a little they just pour it out and put up new bags it seems to work as my uncle was having trouble with the deer eating his apples and pears at his hunting cabin its not fenced in all he does is put the bags of hair up and they don't come around like they did he just takes them down late summer so they start coming around a little better but i wouldn't totally depend on just the bags of hair i guess they smell the human presence and go the other way its free and worth a shot