Yes they hiss lol. I have to admit the first time I sneaked up on them at night, they all seemed to be hissing, like cats, lol. Its a little disconcerting. Now, about that fez. He will be hanging around at night maybe, or roosting nearby. At least for a day or two. I would leave the door open (of course move the others), leave some food, and keep watch here and there. Also, a two door system, is a good option. They should open inward. One should always be closed. Not so much in grow out pens, but in main pens. I got the idea from one of the big pheasant hatcheries, maybe it was McFarlane's or McMurrays. I only keep 3 or 4 roosters with 25 or so hens and losing a rooster would be a bummer. Sorry : (