My vets said there's an offer on at present of a free bag (not sure size) Hills J/d, which is for cats with arthritis. It has glucosamine in the food apparently. Suitable so I'm told for seniors. I'm going to get my packet tomorrow and see if Max likes it. The nurse said not to give arthritis supplements at the same time as the food.
Presumably this offer is everywhere at present so am passing it on.