Dogs need appropriate exercise for physical and psychological welfare; both insufficient exercise and inappropriate exercise impose welfare costs that evidence-based management can prevent.
Dog exercise welfare requires calibration to individual needs rather than general prescriptions. Insufficient exercise causes frustration, obesity, and the behaviour problems associated with unspent energy. Excessive exercise — particularly in puppies with developing skeletons — causes physical damage to joints. The quality of exercise matters as well as quantity: a 30-minute varied walk that provides opportunities for sniffing, exploration, and social interaction provides more welfare benefit than the same time spent on a treadmill.