Perry, http://ncse.com/cej/3/2/answers-to-creationist-attacks-carbon-14-dating
In the article above you will find the reason why mussels cannot be dated but other fossils can. The situation with mussels is very different than with other creatures.
Try reading scientific answers to creationists (Mostly Young Earth Creationists at that).
This is also an excellent book about scientific answers to creationists. Over 500 oversized pages of fine print dedicated to almost every creationist argument:
Science and Earth History: The Evolution/Creation Controversy.