Electric shredder recommendation for bramble

I moved on to several acres last fall. One of the challenges this first growing season will be keeping the blackberry bramble at bay. I've been working with loppers to liberate trees by hand. The land has been neglected for several years so the first step is to remove the old growth blackberry bramble that makes up the scaffolding for the new growth. I'm a fan of chop and drop methods, but I'd like to get a dog soon too and keep imagining what a chuck of blackberry vine would do to their foot pads (and mine!). I had the idea of shredding the bramble with an electric shredder/chipper so I've been making separate piles for dried and green canes. I'm caught up in the research stage and can't seem to make any headway. I would love feed back from your own experience. What has or hasn't worked for you? Is there an electric shredder you would recommend?

There are machines which fit tractors, I think they are called roto mulchers and they eat their way through bramble patches.
It may be worth lookjing at.
\ They are about 4 feet wide from memory.