My Mum and Dad used to regularly dog sit for their friends two Rottweilers. The years passed without too many problems except one escaping after the old man left the side gate open when he came back from the pub. So of course the search party goes out looking only to find the dog has returned home which was well over a mile away and got into his back yard which was locked and my Dad had to use a ladder to get in how he got in we still don't know. The other time they had trouble the male dog had passed away and only the female was left, so they were taking her in the car to take her for a walk near the beach. Unfortunately she decided to jump out of the window when she saw another dog to play/fight with but the lead was around my Mums hand and injured my Mum as well as herself but luckily not serious but my Mum was bruised for weeks. So I think I'd give it a miss myself.