I have one drake with 2 females. The ratio seems to be good so far, but I know spring/summer may be different and I have preparations in place for when that time comes for separation.
My drake definitely guards his flock when we come out or the dog goes into the backyard. He hasn't tried anything....but he's like the ghosts in Super Mario...when you aren't looking he sneaks up, but when you turn and face him he stops or walks the other way. (My kids play that game and we saw that level and laughed so hard, saying that is exactly what Gerald does, he's also grey/white). I think this is normal behavior and I'm waiting to see what he does. He is never aggressive...just sneaky. We can pet the girls while giving treats and whatnot, he just stands behind them and talks to us.
Also his neck fluffs up when we are out there. The kids laugh and say he has a mohawk...guessing this is also more of his territorial drake behavior?