I have a couple questions regarding grapples:
1) Are successful Grappling Combat Maneuver checks that are used to apply damage to a target considered "natural attacks" for the sake determining if Rend can be applied?
(A grappler with the Greater Grapple Feat can attempt two grapple checks in one round.)
2) Does the following scenerio sound legal (or have I missed an aspect of a rule or two that would prevent this).
A creature ("Grabber") with rend, grab and 3 claw attacks (and a very respectable CMB) takes a full attack action vs a single target at least one size smaller than itself:
first attack w/ claw hits, claw damage is applied and grab gives Grabber a free grapple check. The Grabber attempts the check at a -20 penalty to leave other limbs free and the check succeeds (the target is now grappled but Grabber is not)
second attack with claw hits target, claw damage and rend damage is applied and the Grabber gets another free grapple check. Since the target was already grappled The Grabber gets a +5 circumstance bonus on this check. The Grabber again opts for to take the -20 penalty to his CMB to leave all limbs free except the one already grappling. The check succeeds and the Grabber pins the target.
third attack with claw hits target, claw damage is applied. The Grabber gets another free grapple check with the same +5 circumstance bonus as before but this time opts to use all limbs for grappling so no -20 penalty is involved. The check succeeds and the Grabber ties the target up.