We are currently looking for a rescue dog and put in a preliminary inquiry for a medium sized young dog with relatively few details available at the time. They responded to say that she was not the dog for us (quite rightly once they gave more information) but part of the feedback was that our estimate of how much exercise we could offer daily - 45 mins twice a day almost all off lead - was insufficient for a young, active medium sized dog. This is our minimum - we could offer more at weekends etc. I know very few people who exercise their (often quite big) dogs for this long on a daily basis. Are we grossly underestimating how much excercise a dog needs? We were recommended to thinkg of something smaller / a lot older.