I have seen other's recommend SpiderWire fishing line. Something like 5 to 10 times stronger than similar sized monofilment lines. Reportedly you have to cut the line, biting and trying to break with your hands will not work. The drawback is it expensive and requires the use of certain knots because it is slippery. Expensive means $10-$15+ a spool. <br><br>Some people have reported that it is more likely to tangle. <br><br>This is an option you might want to investigate.<br><br>