If you have just one dog, how much time do they get to play with other dogs on a daily/weekly basis such as play fighting etc? If you have two dogs (could be more I guess but I think two means you can accurately gauge how much one plays) how much do they play together? Do you feel that play fighting is more energetic or less than an offlead walk on their own? Do you feel a relatively forced walk on lead is very challenging in comparison etc? Rupert and Milo play a lot and Rupert is getting a lot less walks lately and I'm wondering if maybe the play wears them out more than I realise..?