There's something screwy going no with that monster entry in the document. The damage should be 1d6 for the claw and 2d6 for the bite. No wonder the wolves mullered your party! I think maybe that was an older formula.
Allowing them to apply the skill dice to damage is the same as giving everyone a free application of Deadly Strike (which is applying a dice to damage at a 1:1 ratio). They do already get to make that decision normally(they can use any of their dice for damage, including the skill dice) but it's at a 2:1 ratio if they haven't taken Deadly Strike. Obviously it's your game, though, so you can houserule however you wish - that does increase damage overall though.