Our chickens eat acorns. It's a bit problematic, because they seem to collect in the crop, not moving down to the gizzard where they can be ground up and digested. When I butcher roosters, they have a collection of acorns and caps in their crop, even if I've had them away from food for 24 hours.
I'm building my pen under a big oak tree that drops alot of acorn's. Does anybody think it will be a problem? They will also free range in a 1/2 acre lot, that is almost all oak trees. Would extra grit help? The ground here is sandy, and I figured they would get enough grit in their crop that way.
I have several oaks in and around my yard. I sometimes use oak leaves which contain acorns for litter. I have yet to have any problems from it. If your soil is sandy I think you are ok for grit too. I never give mine supplemental grit.
. The late freeze killed them all and killed one of our huge white oak trees. But,when we did get acorns,my hens loved the ones I would step on and squash for them.
I kinda figured a whole acorn, would be hard for a chicken to swallow. If they do like them, I hope their gizzard can grind them. It would save me alot of money, on feed.