My Delaware is the smartest out of all of my chickens, and always has been. She's my rooster, and I know if something isn't right out in the yard because of whatever call she's using. Food out... water out... there are different calls. Let us out of the coop, etc. She catches mice for me, and is the first to figure out a new food. I can even lean out and call her by name, and she comes running. But being smart isn't always the best, though. She's also a gold-digger. If she comes up to me and sees that I don't have anything for her, she's gone. She doesn't stand around like the other chickens, hoping I'll come up with something. She's done. I've heard from several people that Delawares are very smart.