You can stop using the Infasoy now and change to regular soya milk in cartons. You may need to give your son a calcium supplement if the soya milk you use does not have added calcium. You cannot give your child cow's milk if he has been on the Infasoy because he is allergic or intolerant to milk.
Your son should not have bad breath. It is not due to the Infasoy. He should be examined by his doctor in case he has a persistent blocked nose or he may have a tonsil infection.
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