I was going to use paint to draw in lines but the skeleton doesnt show well enough. so... pick a branch that has more than 2 inches of bare skeleton below the head. hold it by the branch and the main colony trying not to grip the tissue at all because this can bruise it and cause reccesion. then snap it off as Far from the head as possible, the flesh extends down inside the skeleton about an inch or more, so you want to nmake the break as far as possible from the head to prevent damaging the tissue inside the skeleton. I would make the break as clost to a branching intersection as possible (its usually the easiest place to snap it any how. if you have a fine toothed band saw or a dremel or tile saw you can use that to cut the skeleton usually works best. Do not use pliers or snips as it tends to crush the skeleton potentially damaging the tissue inside. some people reccomend snips for this I dont. sawing or snapping has yeilded the best results for me.