well i dont think theres a need to reply now lol, i would never dream of using a muzzle after some of the things i have seen or heard of being bolted from rabbit warrens, get yourself a deben mk 3 locator and a couple of collars then get back out with your ferret, as for the time you should give them underground i reckon all depends on the size of the warren and how many ferrets your using, bigger warrens i tend to leave for half hour or so the smaller ones about 10-15 minutes, alot of the time though the ferret will show above ground and if you make your way over to him/her they tend to go ba