| Shadowborn |
The PRD wrote:
Buckler: This small metal shield is worn strapped to your forearm. You can use a bow or crossbow without penalty while carrying it. You can also use your shield arm to wield a weapon (whether you are using an off-hand weapon or using your off hand to help wield a two-handed weapon), but you take a –1 penalty on attack rolls while doing so. This penalty stacks with those that may apply for fighting with your off hand and for fighting with two weapons. In any case, if you use a weapon in your off hand, you lose the buckler's AC bonus until your next turn. You can cast a spell with somatic components using your shield arm, but you lose the buckler's AC bonus until your next turn. You can't make a shield bash with a buckler.
I've highlighted the sections that apply to what you're asking. You would be able to attack with claws, but the arm with the buckler would suffer a -1 penalty. Attacking with both claws in a round would negate the shield bonus to AC from the buckler.
Mergy
|
Yes, although the bite and claw would be at -5 and half strength. If you've already got a bite and two claws, I don't think another attack is necessary. Bear in mind also that the penalty for attacking with the buckler hand is merely -1, so it's probably still worth attacking with it. I view a buckler as great passive defence, but knowing when it's worth giving it up for more offence is a good skill to have.