biking i thinks alot easier for us and very good work for dog i take my 6 year old dog at least 12 mile every other day at a decent trotting speed an on days off just walk him for a hour with me 9 year old bitch my new pups due at xmas so will walk him every other day straight after other two for half hour to get him used to roads and noise ect.then i will up his distance acordingly.i have been biking with me dog for 3 months now and hes really coming on well now.i cant figure photobucket out otherwise would put before and after pics on.keep at it bornhunter and atb