my dd is just over 3 months and I thought I'd try her in some baby rice. I've bought the aptamil one that seems to have only just begun to be sold. anyway, have made it up to the instructions on the packet and it's so runny. pretty much feels like I'm giving her milk on a spoon. I guess this is the right thing as my dd as all babies has only had runny milk since birth but when would you start thickening it up?