Same here! I have a 8'x10' shed that I converted into the chicken coop, with a 14'x'8', 7' tall open run attached to it. I never have any problem getting the flock into it in the evenings. They see me come out the back door, heading their way, and when I get halfway to the run, I'm speaking...
This is what I would recommend, myself. The owl isn't going to come back until after they've gone to roost, asleep, which is the reason why you didn't hear them making any squawking when they disappeared.
And, oh! I'm going to be rude here. Tell your husband he's an idiot. Chickens NEED a...