Like Summer said, give knuckle bones to chew on. I wouldn't add calcium, she just needs to strengthen those muscles. You can tie a knot in a washcloth, get it wet and freeze it and let her chew on that (supervised, don't leave her alone with it). I froze whole carrots and gave them to Stosh- the shape can get into those hard to reach spots. You can make kissy noises so she will pick up her ears. Try not to stress out about it, she's just a baby!