I let my chickens free range an hour before sunset daily, weather permitting, they make their way back to the coop just after sunset.
I do a head count and lock em up.
I don't free range pullets till all have begun laying for at least a couple of weeks.
I am with them continuously for a couple of weeks, then check on them frequently, till they learn the way around my property.
Still even after a couple of months a pullet got separated from her flock and start squawking.
I had to show her the way back to the coop.
In 4 years of letting chickens free range, I lost 2 hens and a pullet.
Two were lost at sunset when I was late getting outside. A hen to a Fox, and a pullet to a Coopers Hawk.
I lost a hen to a Bobcat just minutes after letting them out, about 50 minutes before sunset.
Most attacks happened at sunset, so I set an alarm on my phone 10 minutes before.
I don't like to lose any chickens to a predator, but chickens do love to forage for bugs, grubs and worms.
Each of my 2 Flocks of 3 and 4 have a 200 square foot pen during the day. GC