My chickens reminded me why I put a wire screen around my vegetables. They ate all the leaves off my newly planted round eggplant.
Although chickens can eat the fruit of an eggplant like us humans, the eggplant plant itself is considered toxic to the chickens. It always shows up on the list of things not to let your chickens eat. I'm talking about the leaves of the eggplant. Eggplant is in the nightshade family and your chickens can get sick, or die, if they eat too many eggplant leaves.
I grow eggplants at home. I toss all our bits and pieces from the eggplant fruit into the chicken bucket. But when I pull the plant, it goes into the pallet wood composting bin and not into the chicken run composting system.
A person should protect the nightshade plants from the chickens and/or the chickens from the nightshade plants. Either way, your chickens will be better off not eating the leaves from those plants.