Just how long is quite a while?? A month, 6 months or a year?
Started protein this year. Had tried in previous years but failed. This year I purchased a timed protein feeder from all seasons which kept a constant supply of protein out. Had it not been for the timed unit I'm sure they still wouldn't have taken to eating protein (years past with a different feeder coons would dump the whole thing out).
It took the deer from March all the way till the week after thanksgiving to eat protein out of the feeder! From the time they started eating through 1 week before Christmas I had over 1k pictures of deer eating protein! Feeding Double Down.
Every time I go to my hunting areas, even during off season, I ALWAYS corn the roads. Eventually they get used to the sound of the ATV and know food isn't far behind.