How to stop biting?

[mochalight]

Hi all, I'm desperate for some advice!
DD has ASD and recently has really started to bite others quite badly. Just picked her up from ballet class and teacher raised serious concern she has bitten two kids and the TA and sometimes pushes smaller kids; it's not the first time she mentioned this but it's the first time she told me seriously that I need to take dd to see professionals as if it goes on she will cause damage (sensing exclusion). The first time the teacher mentioned this I immediately checked with school if she does that to classmates and was told no but sometimes to adults and they are monitoring that. She doesn't do that to us at home so I don't know how to teach her when we are not in the context (she has significant difficulties with social communication and language). I saw her bite a doll at home and immediately told her no and explained it hurts and not appropriate, and pretended that the doll cried, but she hasn't done this in front of us again.

I want to teach her to understand biting hurts and is not appropriate. Any tips and advice will be greatly appreciated. Thanks!

Thanks Polter and Zzzzz! How silly of me that I didn't think of the stop of music as a trigger. Probably I was assuming all the time there must be something more provocative that triggered her. In the next lesson I will check with the teacher if it always happens after the music stops and when dd has nothing to do, will also suggest them to fill in the gap for dd or just keep her occupied. She is learning to wait but she needs to be verbally reminded - that's another thing I can ask the teacher to try. I will also try chewigem and stress ball as she's displaying more sensory needs these days. They are now on a break so I have a few weeks to sort it out. Hopefully the issue will be resolved, at least to some extent, in the new term.
Thanks a lot!