When I moved into my current house, there were two fairly large "spiky" bushes. They grow fairly quick and I have to prune it quite a few times a year. I ended up buying an electric hedge trimmer to help speed things up, but I still end up spending more time on it than I'd like. Plus, they are so tall that I need to carry a ladder out to prune the tops.
I notice that other people have bushes in their yards that they cut down very short in the winter. I've never done this so I'm looking for some advice to make sure I don't kill the bushes or make them hideous looking.
Here's some pictures:
1) Is this the type of plant that can be cut short without killing it?
2) Is there a certain time of year that is best for cutting?
3) Is there a limit on how low I can cut?