Supplements for senior cat

[Pleasenomorecheese]

Our 14 year old girl is diabetic-but otherwise in good health. But she’s looking a bit stiff (we’re seeing the vet next week as previously she’d suspected arthritis)and I wondered if anyone could recommend a decent supplement to give her back some sparkle!

Mines on salmon oil, she’s 12/13 original owner wasn’t sure (men 🙄) and I think she moves better now. She can jump onto the kitchen table to dive bomb my bacon sandwich so that’s nice.