Pixie's first 'proper' walk

She has had free run from the start at the leisure centre  and in Ely park, and has been along the drove beside the dyke on lead; but today we went to Devil's Dyke near Burwell and did a proper walk along a public footpath. We didn't walk as far as we would normally do as she is still only a baby. She decided Merlin was the one to stay with so was running at full speed most of the time. All four have been asleep for over 3 hours now - and we only walked for 25 minutes! 
I tried several times to get a pic of them all running back to me, but each time Mystic got back first and turned round to watch the the others!