Thanks all
I got my girls at 9wks and if I recall correctly they weren't being fed grit then (Treegirl, if I remember wrong - sorry!).
They don't freerange because I'm not home & live near an intersection. Right now they don't even leave the coop as my henyard fencing needs to be redone.
I've tried some supervised outside time, leaving the coop door open while I work in the yard nearby - no takers.
They'll gather at the door, discuss it and go back inside.
I got them some chick grit yesterday and am feeding it free choice from an aluminum chick feeder base.
Interesting whoever said "don't" on the unhulled sunflower seeds because of impaction.
I feed my horses BOSS & there are horsefolks who won't because they swear the unhulled seeds can impact a horse's gut & cause a colic.
After 4 years my horses are shiny and fat and noone has had a problem.
My manure pile looks like a Van Gogh painting from the volunteer sunflowers
If I'm quick I'll save the hens a sunflower head for Winter - gotta beat the wild birds to it!