We used to have a 'big bitey pig' called Vimto - I used to get actual snaps off Vimto and she would draw blood too

She was just a very scared piggie and felt vulnerable on laps, she didn't appear frightened on my lap as didnt freeze (but obviously was) but she was confident enough with me not just to freeze and it was here way of saying 'please put me home i don't like this' by biting me hard. We worked at it and would take her out for 30 seconds then pop here home, we did this 3 times a week for around a month then slowly increased it up to 5 mins via 30 second increments . Each lap session she'd have a sprig of coriander. It took us 6-8 months before she stopped biting and she would happily chill on laps for a while but not for too long

We would never let anyone else have Vimto on there lap in case she wanted to taste the forbidden flesh once more