Hi there. as with introducing any new animals to each other do it slowly. make sure the puppy is firmly held and let your cat come and sniff it. She may lash out or hiss but don't worry this doesn't mean they won't settle together.
My daughter introduced her ten year old cat to a border collie puppy a couple of years ago and now they sleep on the bed together. The cat put him in his place right from the start with a firm paw across the nose. If the dog wants to play the cat just hisses and walks off. The dog won't tolerate any other cats in his garden.
They usually work out their own boundaries.

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