how much weight gain is too much for a 2 year old

[Visitor7]

Nina was 13.5kg at 2, she is now 14.8kg, only 2 months later. And she's grown 3cm apparently. I thought it was heaps as well. I used the same scales at my dr's.
I have no idea when they slow down though. She seems to burn endless amounts of energy, so I'm surprised she's even gaining weight, lol.

[Nai]

My DD is 2y8m and weighs 12.8kg - she has gained 1kg in 8 months

My friend's DS is 2y6m and weighs 17kg - so there is a massive difference in what kids the same age can weigh at this age.