[Weatherlight]

HeraHero, same idea. I wouldn't try to hide that you plan to not eat meat; I would announce it clearly. Everyone will find out anyway, you should explain and discuss now, yada yada.

hydrohoki, if they wouldn't like her as a guest, she should just find out now. If they'll tolerate it, good for everyone. Just because someone invited you as a guest doesn't mean you should stay there as long as possible and obey their every whim even if it means contributing to the murder of dogs, toddlers, cavies, or birds.

When in Rome, do as morality tells you to. Some people will think you intolerably strange/rude/crazy/whatever. Some will be more or less indifferent. Some will enjoy talking honestly with you, be delighted at the opportunity to learn about about something completely novel and exciting to them, and find you interesting and likeable. Whichever the case, you'll be doing the best you can.

CF#5, awesome point about vomiting. I completely forgot about that aspect.