I think sometimes all you can do is show how awesome you are doing. Let them observe your lifestyle. It might spark their interest.
there's only so much you can do, even though you might feel extra guilty about your daughter not being vegan. it's a choice we make for ourselves. it is supercool when someone tells you they went vegan because of you, or even makes better choices as a result of knowing you. But that doesn't always happen, and it's no judgment on you.
try to keep cool. i used to get PO1d in this situation (influencing the kid) but they mean well, deep down somewhere.