If you don't get a recommendation in Bern and are open to traveling further afield, I can recommend Dr. Annina Laim at the Ennetseeklinik in Hünenberg ZG
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https://www.ennetseeklinik.ch/site/index.cfm https://www.ennetseeklinik.ch/domain...ina%20Laim.pdf
That's quite a trek for you, however. Hopefully someone will have a recommendation in Bern.
Dr Laim studied at UniBe veterinary school, so I would guess that the Kleintierklinik at the university might also be a resource for you.
Also, ask your general practice vet - often this is offered at the practice, or your vet will know of someone in the area.
Veterinary acupuncture is fairly easy to find in Switzerland.
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I am so pleased to hear that your girl's tumor turned out to be benign. What a relief!