By the way, I was concerned about my chooks eating horse chestnuts that fell from my trees and got cracked open and bits of the nuts would lie all over the ground. I know they are harmful (deadly) to humans, though not squirrels. And I worried the birds would be affected. But somehow, they either never at them, or if they did, the nuts weren't harmful to them. (Horse chestnuts are completely different from regular chestnuts).