waaaaay off topic, but yes. as long as the body gets the nutrients it needs, the form it comes in isn't relevant. mother's milk + adequate proper nutrition is all a baby needs to grow properly. things like iron, b-12, omega fatty acids, etc. can all easily be found naturally in plant products.
unfortunately, it's far too common for parents (regardless of diet) to exhibit laziness when making nutritional choices, which makes preparing meat or dairy free meals for children "too hard".

anyway, back to bikes...