Just to point out for your next post:
Kili is allowed to just notice Saeril behind the rock formations nearby, probably assuming that she heard of what lies ahead. I will keep her suspicion of his injury to a minimum, since we don't want her to assume that Thorin was responsible. 

That way, later on, during the trade, they will both realize that they were both hiding something from each other; just to show how deep their bond really is: that they both deeply care about each other. Thorin will get angry at her, of course, once he learns about the fate of his father; in his current state, he might attempt to go far as to try and kill her, but Fili and Kili will obviously defend her, to the death.