I have an Arethusa that is about 12 years old. It is about 6 ft. tall and at least that wide. . There are two huge canes that are barky and about the diameter of my fist. There is a lot of dead wood on these two canes. In addition there are 5 healthy new canes about 4 feet tall. I am not sure whether to simply leave this bush alone with no pruning or try cutting out one of the old barky canes. If I do that I am left with a truly ugly and absurd looking bush. I am afraid if I remove both the old canes, it will kill the bush, though I think it would look like a new rosebush with the 5 canes. I always read about rose bushes that have survived with no pruning at all and had planned on that approach, but when I remove the dead wood those tree trunk limbs don't look very attractive.