It is difficult for me to advise you here because you do not say how long your baby's tummy has been runny. Also whether you think it is due to one or other of the formulas you have given him. It may simply be due to a tummy bug but it seems more likely that he may be reacting to the milk formulas. He may have lactose intolerance.Try him on a soya formula such as Isomil2 or Infasoy and see if his stools improve. If his stools are very watery and frequent he will benefit from a full day off milk and the use of a rehydrating/electrolyte solution such as Gastrolyte or Rehidrat and then onto the new Soya formula.
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