Last Saturday, we had gotten another ferret who is about 3 months old. He bites a lot, and we assume most of it is him trying to play, but when we try to do what we did with our other two ferrets - scruffing, telling him no, and putting him in time out - he just bites harder and more frequently, enough to break skin. Scruffing him just seems to make him more aggressive.

How do you deal with a biting ferret when the usual methods just seem to make it worse?