How to take care of a rabbit which has rheumatism?

Can you answer rabster’s question about Arthritis?:

Hi
I has a old rabbit. One day, one of her back hind keep streching out and she has problem walking. I bring her to a vet. The vet say she has rheumatism either at the leg or spine. Do anyone of you have this problem before and how you handle it? Can share with me how to take care of her better and hopefully let her get well soon.
Thanks

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