I had a friend recently recommend Cod Liver Oil for my cat. She's got a bit of limp, and I know her hips are hurting her. I have no doubt that she's arthritic. Reading up on the subject, it stated that cod liver oil supplements often also has lots of Vitamin D, which can be hard to process or harmful for kitties with low kidney functions. Hope is being treated for low kidney function. Has anyone had any experience giving cod liver oil? any recommendations for brand without Vitamin D? Or have another product they use for helping with inflammation for arthritis?