Con you told us on another thread that your dog used to get out because you had a job keeping him in and he would roam around the roads and eventually come home. This is not responsible dog behaviour. Also on one thread you said he had a walk on Thursday and at the weekend??? I just can't stress enough that a young JR puppy (yes anne a puppy) is not the dog for you as Baldric confirmed. Agree with pasta, a Greyhound would be well worth considering. I am not saying this to have a go at you, really I'm not, I just think it will be a recipe for disaster, for you and the dog. I'm sure you could find one that will better suit your needs and you his.