Heartsong: Did the whole pack see it?

At the end of Heartsong, when Robbie gets his memories back, he tells Kelly that he’ll see his memories too. But did this apply to the whole pack? After he gets his memories back Ox and the rest of the pack immediately go get him but was that because they saw his memories of getting brainwashed or because they could just sense his distress? It isn’t made clear in the book but I was wondering what everyone else’s take on that was.