my 3 week old embden gosling is biting me. It is unsexed but I call it a him. He is hand raised and imprinted to me. He loves me! But when I'm petting him or he is sitting next to me, he is almost constantly biting me with a twisting motion. It hurts! I've tried holding his mouth shut, hissing, and pushing him away, but absolutely nothing works. Why is he doing this and how do I correct it?