Was setting out with chickens and tommy. He came up and walked past several times, tail fanned, feathers fluffed. He got closer and closer with each pass. Pressed his chest against my leg once. Walked back and forth some more. Then he picked at the hem of my tee-shirt. Would pick at it or any loose wrinkle in my jeans. Did not hit hard, just grabbed, and would pull some. When his beak would slip off, could hear it "clack" together. Was the picking and pulling an ok behavior? If is wasn't and was an aggressive or other such behavior I should stop: how do I stop it? Don't know what he was doing (challenging me? accepting me? just curious about me?).