A time-out might work. When he bites, just put him in his cage for just 2-3 minutes, and see if it works. I might suggest to stop tapping his nose. It could hurt his nose and create more anger for the ferret, so maybe that's why he's biting back. I got pretty lucky with my ferrets, nip training was easy for all but two. One, Johnny, I am still nip training *rolls eyes* he is over a year old already lol He just refuses to learn. Another one, Fonzi, I figured out, was biting to get down (a member of the FML helped me out with this one! Thanks again! He isn't biting anymore!!) so I let him down and learned to let him come to me. A scuff and gentle drag on the floor might help, and positive reinforcement it always good. When he does somthing good, give him a lick of 'tone, but don't reinforce the bad behavior. Hope I could help a little, Good Luck! Krista [Posted in FML issue 4717]