How should we prune prune BrazilBerry "Strawberry Shortcake"? (One book refers to it as "Raspberry Shortcake", so I'm not even sure of the name.) Should it be pruned like regular raspberries? All its canes are brown on the bottom half and green on top, except one which is all green. I'm inclined to cut some of the canes as there seem to be too many. The instructions that came with the plant appear contradictory to me. We did not get any berries from it this year.