It's raining cats and dogs

Have you ever tried to introduce a somewhat cranky aging cat to a puppy-like dog who is bigger and faster? The past two weeks have been consumed with keeping EL GATO safe from EL PERO (is my spanish even close?) We now have a baby gate up in the hallway raised up enough so the cat can squeeze through but the dog cant' We also have half the house closed off for the dog and the other for the cat. The dog is good 90% of the time when we put them in the same room, but did chase the cat once (we went a little too quickly in the introductions initially) and now whenever we try to introduce them again (all the while keeping the dog sitting and feeding her treats) the cats hair rises up off her back and she makes a horrible hissing sound. If only her previous owners had left her front claws in then she might have a fighting chance to tell Maggie who should be boss. I'm thinking that one good swipe across the nose with cat claws might make Mags think twice about chasing that speedy little grey thing. Do they sell 'false claws' or do claw inplants?????????????