hiya mate i had the same problem with my years jill first few times out but after bolting a couple with my other hobs and given her a good look and a shake she's come on great and as for killing down i have one bloody hob whos an expert might be because he was wild for a good three months or so before he was trapped and given to me, i find it pays off to feed him before i go slows him down abit and gives him less of a desire to kill i guess. if their escaping the nets try using a lighter weigh like 6z with a small mesh will tangle better ensuring the rabbits well tangled, but if its more a cas