I bought a house last summer that has 10 rose bushes. I am brand new to rose gardening, but have been working to learn how to properly care for them. These rose bushes are probably 8 years old, and as far as I can tell have never been properly pruned. One in particular has beautiful red roses, but it is overhanging my front walk and needs to be cut back. Everything I've read online says to leave green canes, but as far as I can see, this plant doesn't have any. It is about 7 ft tall and the bottom 3 ft are just thorny, 1-2" diameter red canes without any leaf buds. Also, the bud union is above ground by about 1" instead of being below ground.
I'd really like to save the plant because I love the deep red roses, but do I need to just dig it out and start new? Any pointers on how to choose what canes to prune if I decide to try to save it?