I agree with Logan. Better a little less freedom and not out running. Our dogs are inside whenever we're gone for that very reason. I would just die if that happened...so I TOTALLY understand your feelings. We crate some of ours and let others out to roam the house because they are trustworthy enough. Reading your story brought back that fateful day when all but Sox got out one morning before I went to school...that was awful, to say that I've changed THAT routine is an understatement. Poor Angus, he sounds like a worrywart...good for him to be worried about his sisters. I would definitely suggest crates or leave them in the house.