Always thought the idea of a rock dog was they don’t get stuck. You may not get every fox with them but you always get your tea at tea time. An old bloke I know is 72 worked rocks all his life several times a week, he always tells me there’s no such thing as a bad pile just bad dogs. Suppose he’s got a point a good sensible rock dog should never go where it can’t get back from. We’re not talking digging dogs now