Best case which is most of the time Gauge gets about 30 mins in the morning and a few 30 to 45 min play sessions in the afternoon. I bring him to work if thier are dog friendly dogs his size to romp and play with. I usually spend an hour or two playing and training when I get home from work. He's not crated and sleeps most of time.
Worse case is mostly when it rains and I can't get him out to run but we play inside game find it and work on new tricks and training. Udually I will give him raw marrow bones on those days to keep him buisy.