Question about Hengeyokai and Lycanthropy

[bytbyt]

There is this game I am in on Sunday where one of my friends plays a Fox Hengeyokai. In our last adventure she got bit by a were-rat, and the DM said she is now infected with Lycanthropy. Seeing how she is a shape changer shouldn't she be immune to Lycanthropy?

[TroubleBrewing]

I could have sworn that there was such a rule, but my search through the SRD has proved fruitless.

Looks like your friend gets to enjoy the benefits of lycanthropy.

[Eldan]

No, you aren't technically immune, from what I can see. But it should help against involuntary transmutation, since you can change back.