Thank you for the very useful info .
Yes he is molting , I'm guessing he's just grumpy and hormonal, poor wee man .
He will nibble my beard but when he's close to my ear he really goes for it .
At first I thought he was playing with me but I'm realising now he's not ! What should I do when he bites , atm I'm just letting him bite me and not reacting as he's to small to hurt me .