Unless, like anybody else they are deadly alergic. Most lactose intolerance can enjoy dairy cheese which contains little or no lactose. Most severe alergies to dairy are grown out by five. I ask this cause my friend has asbergers and she eats dairy and wheet and she is healthier then most people, thin, and fit. Her mom does only buys her healthy natural food and eliminates most meats, except when she occasionally eats out. She loves sudhi, loves her philidelphia and smoked eel rolls. Her mom grows her own veggiesvin the summer and she eats better then most people I know including those on a strict diet. I wouldnt want to put my child on a diet as strict as no dairy or milk if it didnt harm him, but it seems drs today diagnose all children especially with autism with all these alergies and scare them out of feeding there kids anything. Id rather do what my friends mom does, just eliminate processed food and feed them healthy natural food, maybe cut back on white pastas and breads and milk and eat mostly cheeses and whole wheets orgsnic. My friend is sharp and well developed. She tsught herself japanize and now teaches children volunteer. Shes tryi g to find a real job which isnt easy with prejuudice. I give her credit for her abilities and strong sprit snd credit her for her heakthy eating.