Thanks for all the responses. The Purina she is on is pet shop one and not supermarket. I asked the guy at the pet shop and he suggested this one as it also helps reduce odour of the faeces.
I will get Royal Canin next time, he said at the time they were about to go through a huge recipe change and to start with this one and then change once Royal Canin got sorted. So I will stick with dry only and give her a chicken next every so often.

I was laughing with the pet shop guy as I said I want and indoor, long haired and senior dry food, he just laughed and said it would be great to be able to order one we really wanted. The other funny thing was the conversation we had about Anastasia, I told her how old and he said she must have been one of the original Ragdolls to be bred here in Australia and then went onto to say did I get her from this breeder lady.
I was amazed at his knowledge, I am in the West and the Breeder in in South East so it was quite amazing he knew where my girl came from.