Does anyone use Yumove for daily maintanence of younger, active dogs?

My lot all do agility and flyball as well as daily mental running/being border collies, so I have just put them on Yumove with the hope this will help their joints and keep them all fit and mobile and the chondrotin etc will be replaced as damaged , but I am not sure if this is a bad idea and yumove is best started when they are older?

id be interested in any replies too,as i have 2 young collies,and dont want them to end up like my poor flyss did,barely able to walk.