Hills prescription diet canine jd reduced calorie is an innovative food that eases aching joints and preserves healthy cartilage for dogs with joint problems and movement difficulties the high levels of omega 3 fatty acids and balance of omega 3 and omega 6 helps to soothe the tissue surrounding the joints it also contains natural glucosamine and chondroitin sulphate which supports cartilage repair joint problems occur when dogs get older and cartilage is worn away faster than it can be rep