#asktheexperts Hi doctor. I have twin girls 3 months old. they born at 34 weeks and birth weights are 1.7 & 1.6 kgs. now they both are weighing about 4.5 kgs. I am giving breast milk plus formula due to less lactation. we are giving similac neosure. can we switch to similac stage 1 as we need 1 tin per 2 days so we are financially suffering. kindly suggest us.