Don't think for a minute you will hunt for any length of time and not make a bad hit that will cause the animal to suffer or wound one you never find. Not trying to be negative, but it is a fact of hunting sooner or later. You can try to minimize the chances by practicing until your very proficient with your weapon and making sure you take nothing but high % shots at the animals your hunting but it will happen if you hunt long enough so prepare yourself to handle it in advance. You have to settle it in your mind that you did everything in your power to make a good humane shot but just didn't get it done that time for what ever reason.