Hill's™ Prescription Diet™ Canine j/d™ is clinically proven to improve mobility in just 3 weeks with the right balance of healthy nutrients and a special omega-3 oil. Key Benefits · Clinically proven to help dogs walk, run, play and climb stairs more easily, see a difference in 21 days. · Helps your dog walk, run and play better by soothing aching joints and preserving healthy cartilage. · Helps maintain joint cartilage thanks to EPA, a special omega-3 fatty acid from fish oil and glucosamine and chondrotin sulphate from natural sources. Please consult your vet for further information and guidance on what is best for your dog