i find my small ferrets nearly always kill underground as they get over the tops of the rabbits and finish them off the big hobs i use tend to work slower and push more rabbits out ,look at the area you are working and use the ferret you think will do the job best , if its allotment there may be holes under sheds and stuff that you cant dig to . dont take the gun i doubt you will be able to use on council allotments any way . ive got a ferreting book somewhere here that i dont read anymore and even though your a dragons supporter when i find it i will post it to you pm me your address , will l