i prefered to quietly as i could enter the dog/bitch one at a time & let them do their job , charlie would slip out 9 times out of ten if you was quiet,, you would often see them spying through the rocks weighing the job up untill the terrier got near them , same as a rabbit sits just back from the entrance untill the ferret gets near ,every ones different some piles are quick bolts, some hours , you get to know the run of each one in time ,no one wants a dig in my estimation , some rock jobs the fox can bolt 100 yds away they are that big 2 or 3 guns often needed ,