I  have  a lot  to say please don't take anything as a threat ,challenge, insult I want to help,,,first to answer your question a three foot hard wood broom stick and a rap on the bridge of the nose will do it,,if you don't have the nerve try stamp collecting!!  You  owe that  animal  respect and quick dispatch!! you owe fellow trappers respect  you need to learn how to use your catch pole and cull a non prime animal,,,we (Trappers)  don't  need to  be seen  pounding the crap  out of a trapped animal!!  we  don't  need  to  be  seen shooting many  holes  into a trapped  animal,, you  need to not  be  seen at all  it isn't pretty  but  it's fair  you shouldn't have any need for a non prime fur bearer!!  or  any non target animal ,,,when you use the stick method there is a  what I call  a  kick out time it's tough to watch ,,,,But you made the choice ,,you could have let the animal go,,,I carry a couple burlap feed bags sewn together as to calm things down,,also helps with culling  use like a blanket  ,,make a catch pole  and learn to use it!!!  I can release a skunk most of the time with no spray (not all the time 

) I really hope I don't sound bad but  you are on the right track and there are many here far more qualified than me to help,, good luck  sorry I got on my soap box but  trapping is a great thing and it has helped me in more way$$  than fresh air,, lets all  have a great time out doors and thanks for letting  me  vent!! JeffW  and btw I choose foot holds  for these above reasons