Hi! Jasper is my 3 year old long haired dachshund who is a happy, healthy guy, weighing 16 lbs. I would like to keep his back (he is a 'long back' doxie) in the best condition possible. We walk every day and Jasper has playtime with our other dogs. I'm wondering if I should start him on a joint supplement now or if there is anything other type of supplement I should be giving to maintain a healthy spine? Thank you