toggle menuMENU Why should professional dog walkers need a license to walk more than four dogs at any one time? Question:Why should professional dog walkers need a license to walk more than four dogs at any one time?Answer: Evidence suggests that this is the maximum number of dogs that the average adult could be expected to control at any one time. This PSPO order has been introduced for public safety. To obtain a professional dog walkers license you / your business must meet a number of conditions. These include providing evidence of adequate insurance, skills and experience to safely walk up to six dogs at any one time.