So my daughter is on Aldi formula(blue tin), she has been since we came home from the hospital and we've had no issues etc. She will be 6 months in a couple of weeks and wondered if anybody could tell me what the difference is between the blue tin and the red tin which is from 6 months. Is this necessary to move her onto the red tin? We have been weaning her since she turned 4 months using from 4 months pouches and jars etc. Any advice would be great :)