G.---I wouldn't really worry about him eating lots of animal protein. We go way overboard on protein as part of the standard american diet. Too much ANIMAL protein increases our risk of all disease processes. I have charts and serving suggestions that I can share with you, if you'd like.
Keep offering different foods. Dr. Bill Sears (www.askDrSears.com) tells that it can take up to 10 tries for a child to accept a new food. Be lovingly persistent. You are the mom, he needs your guidance. Give him choices, but those choices will include foods that you want him to eat. Have him help you shop and prepare different foods. Look them up on the internet and study the nutrition of them together. Appeal to his vanities. Does he want to be a professional athlete? Eating healthful foods may not make him Derek Jeter, but it will make him the best athlete he can be.
Be a good example. If you are a picky eater, your children will be too.
I am taking a series of wellness classes taught by a naturopath who has her PhD in nutrition. So I have a huge collection of articles and other helpful items I would be happy to share with you.
And if you are worried about his overall health and nutrition in the meantime, I would highly recommend a whole food based supplement for your nutrition insurance program. I know of one that is backed by 13 independent studies that show 1) it is absorbed into the bloodstream, 2) it strengthens and balances the immune system (think reduced allergy and asthma symptoms), 3) protects and repairs DNA (think anti-aging), 4) protects and supports the cardiovascular system and 5) reduces oxidative stress/free radical damage by 75% in as few as 28 days.
I am happy to help in any way that I can. Oh, btw, you and your family will get LOTS of protein from plant based sources. Again, I can help with suggestions on how to incorporate more of them into every meal. It's really very easy.
Good luck, hope this helped. D. ###-###-####