Thanks for explaining!They’re poison to chickens. (uncooked skin & plant leaves)
I grant the potatoes & their skins will be toxic after they sit around in the sun. And yes, the leaves are always toxic.
But in normal circumstances, it would not be right to say "uncooked skin" of potatoes is poison to chickens. Both the skin and the flesh of the potato can turn green and become toxic if they are exposed to sunlight. But if they are properly stored (in the dark), the raw skin is no more dangerous to chickens than the raw flesh of the potato.