For what it’s worth, our first spoo was diagnosed with mild hip dysplasia when she was just 6 months old after we noticed that she climbed the stairs more like an old man than a young pup. We were told that at some point she might well need hip replacements. She was prescribed Cosequin, but I ultimately switched her to the same Glucosamine/Chondroitin that I had been taking for an arthritic knee (giving her 750mg/600mg per day of Costco’s Kirkland brand), and she remained symptom-free for the rest of her 11 year life with only occasional minor lameness if she was more active than usual.