As for what to give your son when he doesn't have a cold, why don't you
look into soy milk and soy products.  I think they taste good, although
I don't think they taste like milk.  They are expensive.  But they may
not be necessary: ask your doctor, given his present diet, if he needs
to have dairy foods at all.  I understand that protein and fat are not
so important after two or three years.
--
        Tom Reingold
        t...@samadams.princeton.edu
        rutgers!princeton!samadams!tr
        "Brew strength depends upon the
        amount of coffee used." -Black&Decker