The RSPB advise removal of the netting, Steve T, as it's a hazard for the birds: http://www.rspb.org.uk/advice/helpingbirds/feeding/how.asp "Mesh bags ? a warning Peanuts and fat balls are regularly sold in nylon mesh bags. Never put out any food in mesh bags. These may trap birds? feet and even cause broken or torn off feet and legs. Birds with a barbed tongue, eg woodpeckers, can become trapped by their beaks. Doesn't bear thinking about, does it. On a happier note, birds can be cautious about changes - they will get used to it.