Legal waiver for dog walking service? Is this ok?

WAIVER/RELEASE: I hereby certify the following: (1) My dog is physically fit and has received medical clearance to participate in any walks provided by this dog walking service, (2) I, on behalf of myself, hold harmless any person(s) walking my dog from this service from all claims for any liability, injury, loss, or damage in any way connected with my dog walk and also waive and forever discharge the indemnities from any and all claims that may accrue as the result of my dog?s participation.