My cat has stopped grooming herself. Can anyone advise why this may be, if it is normal and any required action?

Thanks:

it's not normal - i'd take her to a vet for a check up.

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How old is she?

If she's old:- older cats sometimes start getting arthritic and give up cleaning themselves as it's so uncomfortable, you can get suppliments from your vet to help her.

If she's young;- it's not right, get her to the vet.