Here is the situation: The players are being attacked by a pack of goblin worg riders. The PCs climb the nearest tree and start shooting their crossbows down at the goblins. The goblins respond by dismounting and returning fire with their crossbows, while letting their worgs climb the tree for an attack.
Protests ensue. The players argue that worgs cannot climb trees because they lack claw attacks. Claw attacks, they reason, mean that the animal possesses enough manual dexterity to climb.
I counter by saying that anybody can climb as long as they have limbs. I am even willing to concede that creatures without claw attacks can have a penalty to their climb check, but I think it is completely unreasonable to say that they cannot climb at all.
What do you guys think?