My dd is 8 months old. We were using Aptamil stage 1 formula but was advised to go to next stage as it contains more iron etc but she doesnt seem to like this milk at all.we have tried for a few days now, but im always going back to stage 1 so at least she is getting some milk.Should i keep trying her with the follow on milk or just stick with stage 1 for now?she is my first baby so not sure what is best.