Please don't flame me for being OTT with DD's weight etc. It's not something that we would ever talk to her about or even treat as an issue.
DD is 9 in one month's time and we've noticed that she's gaining an extra layer all over. She's not the most active of children but has always been very slight. She eats well and healthily, if you ignore that she won't eat fruit or veg, but has a balanced diet in terms of everything else she needs.
We thought that perhaps we should cut down on the portion sizes (she eats more than Supernanny said they should be eating at that age). But I mentioned it to my mum who said she thought it was most probably puberty starting. 
Is this right? It seems very early.