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How to teach cats to like dogs
Isolate the new pet in a safe space.
If the cat is new to the home, the cat should remain in a safe space in your house at all times, like a spare bedroom. Keep everything the cat needs in that space: food, water, and litter.
Unless it chooses to leave that space, let the cat get comfortable with a small area before allowing it to roam. Make sure your cat has easy access to litter.