And make it look natural? No axes/saws/explosives please. Thought of cutting the bark off all the way round but apart from chewing it off myself I can't think of a way to make it look like it was chomped by some beasty. Background for those that care, there are a number of Black Willow trees at the end of my garden which belong to the neighbours and they are a right pain so they need to go. I can't just chop the things down so need a way to kill them off so they fall over in the next high winds. Any ideas?