I think this is a great topic, and I completely agree with the PP who pointed out that how you and your partner deal with this issue and discuss it with your little guy will go a long way towards family happiness, regardless of the path your DS takes in the long run.
In our family, I am a nearly-lifelong vegetarian, and DH is a big meat-eater. We had many earnest discussions before DS was born about me wanting DS to be a vegetarian, too, but DH always pointed out that while he was in theory comfortable with that, he couldn't see telling DS he wasn't allowed to share in whatever Daddy and other family members - including kids at family gatherings - were eating. The agreement we came to, and ended up sticking with, was that I would *never* cook or serve meat to DS, but that he could eat meat if Daddy was cooking, or in restaurants or at family gatherings, as long as he had full knowledge of what he was eating and made the choice himself.
Well, as it turned out, DS LOVES to eat meat. But - I can live with this because he has learned to be inquisitive and ask about where ALL kinds of food comes from, and at the tender age of 5 he is really good about making informed choices. He refuses to eat strawberries if they are not organic, for instance, even though strawberries are his favorite food on the PLANET. Although we had a discussion at a recent family gathering about how it would probably be ok for him to have a few strawberries from the fruit platter even though I didn't think they were organic, he just shook his head and said, "But Mom, if you do that once then you start thinking you can do it all the time, and I don't think that's a good choice!" He's crazy about roast chicken (he loves to hold the drumstick and munch a la Henry VIII), but won't eat his grandmother's because he knows she refuses to spend extra to buy local/organic/free range.
I still never cook or serve meat, and DS knows why - and even explains it to his friends when they eat at our house. He's also crazy about vegetables (I think broccoli raab is the only vegetable he won't eat), beans and whole grains, and will snarf salad right out of the bowl if I don't get to the table fast enough. He loves our oatmeal/quinoa pancakes and thinks his uncle's white flour chocolate chip pancakes "taste funny". So, although he didn't make the dietary choice I was hoping he'd make, he's still making good, informed choices, he eats a lot of healthy food, genuinely doesn't enjoy most "junky foods", and he can have an intelligent conversation about what it means to be a vegetarian (even though that is not the path he has chosen).
Five years ago when DS was a baby if you had told me how this would work out, I think I would have been sad and disappointed. But from where I sit today, I can honestly say that I feel really good about the way things have turned out.
