What would i have done? Well depends on wether i had permission to be there and wether the fox needed to be culled,if not i would have tied the other 2 dogs up for a start,then when the opportunity arose i would have got hold of either terrier or fox drew them out n let charlie run free,end of problem.If i had permission n fox had to be killed i would do same as above,get hold of fox with both back legs and tail all together so it cant turn n bite you and knock it on head,one good knock will do the trick,it might not be entirely legal but in an emergency is effective and humane,theres no comot