It really depends on the bunny if spraying or other discipline will work. Some really don’t understand it, and for others it can cause fear and aggression, so it really depends on the bunny. Hannah is a good candidate for spraying and it works for her – I haven’t sprayed her in months and months, but it’s handy to have around and point at her when she’s chasing or doing something else bad (I pretty much only point it at her for chasing and the behavior has decreased dramatically over the last 6 months). If you have a bunny who doesn’t learn from consequences (I could spray Otto until he was soaking wet and he’ll keep doing whatever he wanted to do) it won’t work, but Hannah’s bad habits can be broken after a few tries.
If he’s just chasing briefly and pulling out fur, I would let them go and I think he’ll settle down. I only sprayed Hannah because her chasing would go on and on and a few times it resulted in a fight when Otto had had enough. Unless Franz escalates his chasing, he’ll probably grow bored with it, or Jasmine will stand up for herself and he’ll knock it off.