I could give it half an hour or so each morning before anything else, if that's an indicator. I'll look into it. Obviously as I'm having Silkies, they might not be very into roosting, but we'll see!
Also, would you explain what you mean by sifting? I mean, I'm thinking of the cooking type - sifting flour or something! Am I getting mixed up?
Half hour should be fine. I spend maybe 20 minutes each morning putting out chicken food, cleaning poop out of coop and run, and just eyeballing everything to make sure all is well.
And by sifting I mean like cleaning out a cat litter box. I use a cat litter scoop (taped to a broomstick, so I don't have to squat) to sift poop out of the hemp, which then goes into my compost bin. Most of the hemp is fine enough to fall through.