I've rescued a few declawed cats, and one sweet boy Woody is living in a wonderful home with seven others all with claws. He's had no problems as they all get along wonderfully. When you get (or make) a scratching post, but sure that it's tall enough for an adult cat to stretch fully up it. I make my own from time to time, and use the posts from stockade fences. An 8 foot one cut in half is a perfect height. I take it one step further and before I wrap sisal rope up it, I stuff the holes with lots of fresh catnip! Then I rub some dried on the outside. If you make one, use a hammer to compact the rope as you go up, and screws (good sharp ones) to fasten it. That way it's easier to replace the rope.