How.do i stop my 9 week old ferret hob biting?

I just got a baby ferret hob iv had him 4 days he was fine for the first 2 days he never attempted biting now i go.to pick him.up and he swings around and bites me he is always played with and handled he is fed 3 times a day i buy him james wellbeloved and i buy him ferret treats accasionally i treat him.to. Vegtables i really cant see why he is doin this i would never punish him am i doin the right things i am a first time.ferret owner please help if you can? X