Lulu's babies are 14 days old and she had 6. The smallest one is 116gms and the second smallest is 145gms and the others are 165gms to 185gms. Theres a 2 ounce difference from smallest to largest. I made a kangaroo pouch (the pouch is for protection because Lulu doesn't like being flipped and will kick) and put the kangaroo pouch on the mom Lulu and put the baby in the pouch and I can hear him sucking to get milk but when I finish his tummy never seems fat.