You have got a big problem here especially as your son is still allergic to cow's milk and he is intolerant to soya.The only way through at this stage is for him to stay on the Similac Alimentum to 15 months. He should then be challenged again. If he is still positive to milk he will have to stay on Similac to 18 months and then challenge him again. At that stge let me know how he is progressing and I will advise you further.
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